First time in the world, in which state of India, the Communist Party government had came to power through democratic elections?

Kerela

The correct answer is Option (3) → Kerela

As early as in 1957, the Congress party had the bitter taste of defeat in Kerala. In the assembly elections held in March 1957, the Communist Party won the largest number of seats in the Kerala legislature. The party won 60 of the 126 seats and had the support of five independents. The governor invited E. M. S. Namboodiripad, the leader of the Communist legislature party, to form the ministry. For the first time in the world, a Communist party government had come to power through democratic elections.