Correct Option: D

The Supreme Command of the Armed Forces vests in the President, although effective executive power and responsibility for national defence resides with the Cabinet headed by the Prime Minister. This is discharged through the Ministry of Defence headed by Defence Minister, which provides the policy framework and resources to the Armed Forces to discharge their responsibilities in the context of the defence of the country. On August 15, 1947, each Service was placed under its own Chief Commander. In 1955, the three Service Chiefs were re-designated as the Chief of the Army Staff (General), the Chief of the Naval Staff (Admiral) and the Chief of the Air Staff (Air Chief Marshal) with the President of India as the supreme commander.