Step 1: What the question wants.
We need the name of the very first person who held the post of Speaker of the Lok Sabha after India became free and held its first general elections.
Step 2: What a Speaker does.
The Speaker is the presiding officer of the Lok Sabha. This person runs the daily business of the house, keeps order, and decides points of procedure. So the post is very important.
Step 3: The time period.
The first general elections in India were held in 1951 and 1952. After that the new Lok Sabha needed a Speaker to lead its sittings.
Step 4: Checking the names given.
M. A. Ayyangar, Hukam Singh, and Neelam Sanjiva Reddy all became Speakers, but they came later, not first.
Step 5: The correct person.
G.V. Mavalankar was chosen as the first Speaker of the Lok Sabha. He held the chair from 1952 to 1956. He is often called the father of the office of Speaker in India.
Step 6: Final check.
So among the four names, only G.V. Mavalankar fits as the first Speaker.
Answer: G.V. Mavalankar