The mid-first millennium BCE is considered a turning point because major thinkers emerged across regions such as India, China, Greece, and Iran. They explored questions concerning existence and cosmic order. Kong Zi (Confucius) appeared in China during this era. Statement 1 is incorrect because the period witnessed urban growth and political change rather than universal urban decline.

The passage directly links the emergence of philosophers with changing social, political, and economic conditions. New kingdoms, urban centers, and evolving economic life encouraged reflection on existence and social order. Thus, intellectual awakening occurred alongside major transformations. Option A best captures this relationship, whereas the remaining options misrepresent the historical context.

The passage emphasizes that Buddha and Mahavira sought to understand the mysteries of existence during a period of social and economic transformation. Their teachings explored life, suffering, rebirth, and ethical conduct. They did not primarily focus on economics, warfare, or preserving Vedic rituals. Therefore, Option D best reflects their intellectual concerns.

Zarathustra is associated with Iran (d), Kong Zi with China (a), Plato with Greece (b), and Mahavira with India (c). These thinkers emerged in different regions but shared a concern for philosophical questions regarding existence and ethics. Therefore, Option C correctly matches all thinkers.

The Rigveda was not preserved through written manuscripts from its earliest period. Instead, it was transmitted orally for generations by priestly families using highly developed memorization techniques. The hymns were composed in Vedic Sanskrit. Thus, the Assertion is false, while the Reason is historically correct.

Agni was the god of fire and acted as the intermediary carrying offerings to other deities. Soma referred to a sacred plant, drink, and deity associated with it. The Rigveda contains prayers seeking wealth, food, health, and offspring. Therefore, Option A incorrectly identifies Soma as Agni.

Initially, sacrifices were performed collectively by communities. Later, household heads conducted rituals for domestic welfare. Subsequently, elaborate royal sacrifices such as the Rajasuya and Ashvamedha became prominent and required Brahmana priests. Hence, the chronological sequence is 2, 3, 1.

From around 1000 BCE onward, some sacrifices were performed by heads of households for the welfare of their families. These rituals focused on the domestic unit rather than kingdoms, mendicants, or broader political structures. Therefore, Option C correctly reflects the purpose of later household sacrifices.

The Rajasuya was an elaborate royal ritual that depended upon Brahmana priests for its successful performance. Their specialized knowledge reinforced their social, religious, and political influence. The ritual was not associated with renunciation or weakening priestly authority. Therefore, Option B is correct.

The Ashvamedha was a major royal sacrifice performed by powerful rulers to assert authority and prestige. It depended on the expertise of Brahmana priests. It was not a household ritual conducted by ordinary people. Therefore, Statement II is correct while Statement I is incorrect.

The Upanishads reflect a major intellectual transformation in ancient India. Thinkers questioned the meaning of life, death, rebirth, and ultimate reality. They also examined the significance of sacrificial traditions rather than merely performing them. Thus, both Assertion and Reason are true, and the Reason correctly explains the shift in intellectual curiosity.

The mid-first millennium BCE witnessed intense debates regarding rebirth, karma, and life after death. Upanishadic thinkers, Buddhists, Jainas, Ajivikas, and Lokayatas offered differing interpretations. Therefore, rebirth was not universally accepted in the same manner by all traditions. Option C is incorrect because it ignores intellectual diversity.

The Ajivikas, particularly Makkhali Gosala, taught that pleasure and pain were predetermined and could not be changed by individual effort. This differed sharply from Buddhist and Jaina teachings, which emphasized karma and personal actions as shaping future outcomes. Hence Option B accurately captures the fatalist position.

Thinkers outside the Vedic tradition challenged accepted assumptions about reality, existence, and truth. Their questioning encouraged alternative interpretations and greater philosophical diversity. This represented a move away from unquestioned acceptance of Brahmanical ideas toward critical inquiry and pluralistic worldviews. Therefore, Option A is correct.

The reference to 64 sects highlights the diversity of philosophical traditions in ancient India. Competing teachers, schools, and doctrines participated in debates and discussions. Such variety reflects an intellectually vibrant and pluralistic environment rather than uniformity. Hence Option D best captures the significance of the reference.

Kutagarashalas were debate halls or pointed-roof huts (d). Mendicants were travelling teachers (b). Disciple conversion occurred when one philosopher defeated another in debate (c). Support for sects could increase or decline depending on intellectual success (a). Therefore, Option C correctly matches all elements.

Both statements are true. The Buddha and Mahavira challenged core Brahmanical assumptions by questioning Vedic authority and emphasizing individual effort rather than birth-based status. These ideas directly undermined established religious authority and explain why they posed a significant ideological challenge.

The earliest phase involved Rigvedic sacrifices seeking divine blessings (3). Later Brahmanical traditions emphasized birth-based social identity (1). Subsequently, thinkers like the Buddha highlighted personal effort and individual agency as paths to liberation (2). Thus, the correct chronological sequence is 3, 1, 2.

Makkhali Gosala compared samsara to a ball of string that unwinds until its full length is exhausted. This metaphor illustrates the Ajivika belief that all events are predetermined and cannot be altered by wisdom, effort, or moral action. Therefore, Option D is correct.

Ajita Kesakambalin and the Lokayatas adopted a materialist worldview. They argued that humans are composed of physical elements that return to nature after death and rejected concepts such as sacrifice, alms, and afterlife rewards. Consequently, both statements correctly represent Lokayata philosophy.