The First Lok Sabha was constituted on 17 April 1952 after India's first general election. The 1st Lok Sabha lasted its full tenure of five years and was dissolved on 4 April 1957.
1st Lok Sabha Wikipedia
As per Article 93 of Constitution of India, the Lok Sabha must have elected and non-elected officers. The elected members are Speaker and the Deputy Speaker whereas the non-elected members are the Secretariat staff. Following were the 1st Lok Sabha officers and other important members.
Leader of the Opposition position got recognition in 1977 post Salary and Allowances of Leaders of Opposition in Parliament Act.
List of members as published by the Election Commission of India and Parliament of India:
Keys: INC (2)
Keys: Nominated (1)
Keys: INC (15)