Who was the first speaker of Lok Sabha?

Correct option is B

B. G.V. Mavlankar – First Speaker of Lok Sabha from 1952-1956.
A. M.A. Ayyangar – Later Speaker, but not first.
C. Sardar Hukum Singh – Never served as Lok Sabha Speaker.
D. N. Sanjiva Reddy – Later Speaker and President.