Explanation
An ancient book on law is known as option B: Smriti.
Smriti is a Sanskrit word that means "that which is remembered" and refers to a body of ancient Hindu texts that were traditionally passed down through memory from generation to generation. The Smriti texts include a wide range of literature, including law books, poetry, stories, and religious and philosophical treatises.
The law books of the Smriti literature are known as the Dharma Shastra and contain detailed rules and regulations governing social, economic, and religious life in ancient India. The most famous of these texts is the Manusmriti, also known as the Laws of Manu, which is believed to have been written between the second century BCE and the second century CE.
While the Vedas and Upanishads are also ancient Hindu texts, they are not specifically focused on law. The Chanakya Niti, also known as the Arthashastra, is a book on political science and economics attributed to the ancient Indian scholar Chanakya, and is not strictly a book on law.
