The correct answer is option 2: April, 1952. The first elected Lok Sabha came into existence in India on April, 1952. The Lok Sabha is the lower house of the Parliament of India and is composed of members elected by the people of India.

Option 1, January 1952, is incorrect.

Option 3, November 1950, is incorrect.

Option 4, November 1949, is incorrect.

It is important to note that the Constituent Assembly of India was established on November 1949, but the first elected Lok Sabha was formed in April 1952 after the first general elections were held in 1951-1952. Thus, option 2 is the correct answer.