Q. Who wrote the oldest surviving Prakrit grammar Prākrita Prakāśa?
Answer: Vararuchi
Notes: Vararuchi is credited with composing Prākrita Prakāśa. The text is considered the oldest surviving treatise on Prakrit grammar. The probable date of Vararuchi is around the 3rd to 4th century CE. Prākrita Prakāśa provides systematic accounts of Prakrit languages, especially Maharashtri and Shauraseni. The text remains a principal source for the study of ancient Prakrit linguistics.