Correct Option: C

Ganesh Vasudev Mavalankar served as the first speaker of the Lok Sabha during 15 May 1952 – 13 January 1956. Earlier, he was the President (from 1946 to 1947) of the Central Legislative Assembly, then Speaker of the Constituent Assembly of India.
Note : Ganesh Vasudeva Mavalankar popularly known as Dadasaheb was then Speaker of the Constituent Assembly of India, and later the first Speaker of the Lok Sabha, the lower house of the Parliament of India. Sumitra Jayant Mahajan is the Speaker of the 16th Lok Sabha (Present).She belongs to Bharatiya Janata Party. In 2014, she got elected to the Lok Sabha for the eighth time, one of three members of the 16th Lok Sabha to do so, and is currently the longest-serving woman member. She has represented the Indore constituency of Madhya Pradesh since 1989.