The correct option is Manusmriti.
Explanation
The period between c. 200 BCE and 200 CE (Post-Mauryan period) witnessed the codification of oral traditions into written texts. This era saw the compilation of major Dharmashastras (law codes), epics, and scientific treatises, marking a shift towards rigid social stratification and defined norms.Detailed Analysis:
- Rigveda Rigveda: Incorrect. The Rigveda is the oldest of the Vedas, composed roughly between c. 1500 BCE and 1000 BCE during the Early Vedic period, long before the timeframe specified in the question.
- Manusmriti Manusmriti: Correct. The Manusmriti (or Manava Dharmashastra) was compiled between c. 200 BCE and 200 CE. It is considered the most authoritative and influential legal text (Dharmashastra) of ancient India, prescribing detailed rules regarding the Varna system, social duties, gender roles, and statecraft.
- Natyashastra Natyashastra: Incorrect. While the Natyashastra (attributed to Bharata Muni) was also compiled during this approximate period, it is a treatise on dramaturgy, music, dance, and aesthetics, not primarily on social norms.
- Charaka Samhita Charaka Samhita: Incorrect. The Charaka Samhita is a foundational text of Ayurveda (medicine) compiled during this period (associated with the Kushana era), focusing on health and therapeutics rather than social laws.
Key Takeaway:
The Manusmriti is the premier Dharmashastra compiled in the post-Mauryan age, serving as the foundational code for Brahmanical social laws and caste regulations.