Who is popularly referred to as Kalaignar?

[A] J. Jayalalithaa
[B] M. Karunanidhi
[C] C. Rajagopalachari
[D] Sarvepalli Radhakrishnan

ANSWER

[B] M. Karunanidhi

Kalaignar (Artist) and Mutthamizh Arignar (Tamil Scholar)

M. Karunanidhi popularly referred to as Kalaignar (Artist) and Mutthamizh Arignar (Tamil Scholar) for his contributions to Tamil literature.
He had the longest tenure as Chief Minister of Tamil Nadu with 6,863 days in office.