The correct answer is A. Gen. K.M. Cariappa.
Gen. Cariappa was the first Indian Chief of Army Staff of the Indian Army. He was appointed to the position on 15 August 1947, the day India gained independence from British rule. He served in the position until 1953.
Gen. Cariappa was born in 1899 in British India. He joined the British Indian Army in 1918 and served in World War I. After the war, he continued to serve in the army and rose through the ranks. He was appointed General Officer Commanding-in-Chief of the Southern Command in 1946.
In 1947, Gen. Cariappa was appointed the first Indian Chief of Army Staff. He was a popular and respected figure in the army. He is credited with modernizing the Indian Army and making it a professional force. He retired from the army in 1953.
Gen. Cariappa died in 1993 at the age of 93. He was a national hero and is remembered as one of the founding fathers of the Indian Army.
Option B, Gen. Maharaja Rajendra Singhji, was the first Indian Commander-in-Chief of the Indian Army. He served in the position from 1947 to 1948.
Option C, Vice-Admiral R.D. Katari, was the first Indian Chief of the Naval Staff. He served in the position from 1958 to 1962.
Option D, None of the above, is incorrect.