The correct answer is option 2, Constituent Assembly. The Constitution of India was not framed by the Planning Commission, President, or Working Committee.

The Planning Commission was a body that was responsible for formulating five-year plans for the development of the country, but it had no role in framing the Constitution.

The President of India is the ceremonial head of state and does not have the authority to frame the Constitution.

The Working Committee was a committee formed by the Indian National Congress to carry out day-to-day administration and decision making, but it was not involved in drafting the Constitution.

The Constitution of India was actually framed by the Constituent Assembly, a body of representatives elected by the people of India to draft and finalize the Constitution. The Constituent Assembly played a crucial role in shaping the Constitution and ensuring the representation of various sections and interests of the country.