Correct Option (d):
The Planning Commission was responsible for formulating the draft Five Year Plans. However, the final approval for these plans was accorded by the National Development Council (NDC). The NDC comprised the Prime Minister (as its Chairperson), all Union Cabinet Ministers, and the Chief Ministers of all States and Union Territories with legislatures. This composition ensured the integration of state perspectives and fostered cooperative federalism in national planning.
Incorrect Options:
- Union Cabinet: The Union Cabinet reviewed and discussed the draft plans but did not hold the final approving authority.
- President on the advice of Prime Minister: The President of India had no direct role in the approval process of the Five Year Plans.
- Planning Commission: The Planning Commission was the body responsible for drafting and formulating the Five Year Plans, not for their final approval.