The correct answer to the question is option 4, Sukumar Sen. He was the first Election Commissioner of India. It is important to note that the Election Commission is an autonomous constitutional authority responsible for conducting free and fair elections in the country.

Option 1, S.P. Sen Verma, is not the correct answer. There is no record of S.P. Sen Verma serving as the First Election Commissioner of India.

Option 2, Dr. Nagendra Singh, is also not the correct answer. Dr. Nagendra Singh was a renowned international jurist, but he did not hold the position of the First Election Commissioner of India.

Option 3, K.V.K. Sundram, is not the correct answer. K.V.K. Sundram is not known to have served as the First Election Commissioner of India.

Therefore, the correct answer is option 4, Sukumar Sen.