Correct option is D
The correct answer is (d) Sanskrit Grammar
• The Ashtadhyayi ("Eight Chapters") of Panini is considered one of the most comprehensive and influential treatises on Sanskrit grammar ever written.
• Panini is considered the founder of the language and literature of Sanskrit.
• Ashtadhyayi sets the work standard for the Sanskrit language.
• It sums up in 4,000 sutras that had evolved in the Vedic religion.
• It was composed around 500 BCE and details the rules and principles for forming correct Sanskrit sentences.