Explanation:

Mahabharata, the great Indian epic, was composed by Vedavyasa (also called Vyasa).

• Vedavyasa is credited with compiling and narrating the epic, which includes the Bhagavad Gita.
• Valmiki (Option C) is the author of the Ramayana, another great epic.
• Meithreyi is a sage mentioned in ancient texts but not the author of Mahabharata.
• Lord Krishna is a central character in the Mahabharata but not its author.

✅ Final Answer: (A) Vedavyasa