Ashtadhyayi is the composition of which of the following?

The Ashtadhyayi is an ancient Sanskrit grammarian treatise attributed to Panini, a renowned linguist and grammarian in ancient India. Composed around the 4th to 6th century BCE, it is a foundational work in the field of linguistics. The Ashtadhyayi systematically organizes and explains the grammatical rules of the Sanskrit language in a concise and logical manner, consisting of eight books (ashta-dhyayi means “eight chapters”). Panini’s grammarian rules have had a profound influence on linguistic studies and are considered a masterpiece of linguistic analysis and organization.