The Supreme Commander of the Indian Armed Forces is the President of India. This means that the President holds the highest authority over the military forces of the country. The President is the constitutional head of India and is responsible for the overall defense of the nation.
Option 1: President - This option is correct. The President is the Supreme Commander of the Indian Armed Forces.
Option 2: Prime Minister - The Prime Minister is the head of the government and has a significant role in national security and defense decision-making, but they are not the Supreme Commander of the Armed Forces.
Option 3: Defence Minister - The Defence Minister is responsible for policy-making and management of the Armed Forces, but they are not the Supreme Commander.
Option 4: Longest serving Chief of Staff - The Chief of Staff is an important position within the military, but they do not hold the authority of the Supreme Commander.
In conclusion, the correct answer is option 1: President, who serves as the Supreme Commander of the Indian Armed Forces.