The first Tamil Sangam is said to have been instituted by

Answer & Explanation

Answer: [D]

Agastya, also known as Agathiyar, is traditionally believed to be the founder or the one who instituted the first Tamil Sangam. Agastya is a revered sage in Hindu mythology and Tamil literature. He is considered one of the Seven Great Sages (Saptarishi) and is associated with various cultural, literary, and philosophical contributions.

According to Tamil tradition, Agastya is believed to have migrated from North India to the southern region, where he established the first Tamil Sangam. The Sangam was a gathering or assembly of Tamil scholars, poets, and intellectuals who contributed to the development of Tamil literature and culture. The Sangam period is considered an important era in Tamil history and produced many renowned works of poetry and literature.

Therefore, option D, Agastya, is associated with the institution of the first Tamil Sangam.