Which of the following is the largest and oldest military training centre of the Indian Army?

The Infantry School, Mhow is responsible for developing the complete spectrum of tactical drills and concepts pertaining to infantry operating in varied terrains. It conducts courses related to the infantry for men and officers of the various regiments of the Indian Army. Field Marshal Sam Maneckshaw had served as the first Indian Commandant of this school in the fifties while he was a Brigadier. The Junior Leaders Wing, Belgaum is a part of Infantry School, Mhow which trains junior officers and junior leaders in sub-unit level in tactical and special mission techniques. The National Defence Academy is a Joint Service Academy of the Indian Armed Forces, where cadets of the three services, the Army, the Navy and the Air Force are trained together before they go on to pre-commissioning training to their respective service academies. The Indian Military Academy, Dehradun (also known as IMA) is the officer training Academy of the Indian Army.