The correct answer is D. 1952.
The first General Election in India was held in 1952. It was the first election to be held after India gained independence from British rule in 1947. The election was held to elect members to the first Lok Sabha, the lower house of the Indian Parliament. The Indian National Congress (INC) won the election with a majority of seats, and Jawaharlal Nehru became the first Prime Minister of India.
The first Amendment to the Constitution of India was also passed in 1952. The amendment was passed to address some of the issues that had arisen in the first few years after independence. The amendment included provisions for the protection of minorities, the right to property, and the right to freedom of religion.
The other options are incorrect. Option A, 1949, is incorrect because the Constitution of India was adopted on 26 November 1949, but the first General Election was not held until 1952. Option B, 1950, is incorrect because the Constitution of India came into effect on 26 January 1950, but the first General Election was not held until 1952. Option C, 1951, is incorrect because the first General Election was held in 1952.