Hint: The military forces of India are called Indian Armed Forces. It consisted of four professional services. The Ministry of Defence of the government of India is responsible for the management of the Indian Armed Forces.
There are four professional uniformed services in the Indian Armed Forces.
Indian army is regarded as the largest component of the Indian Armed Forces which is a land-based branch. The origin of the Indian army can be traced back to the armies of the East India Company. The main goal of the Indian army is to protect the nation from any internal or external threat.
The air arm of the Indian Armed Forces is the Indian Air force.
The naval branch is called as Indian Navy. Three operational commands operated in the Indian Navy.
The Territorial Army is regarded as the second line of defense. It is not considered as a source of employment, profession, or occupation. The territorial army plays the role to relieve the army from static duties. The territorial Army is meant for individuals who are already in the mainstay civilian profession. Indian Army, Indian Airforce, Indian Navy along Indian Coast Guard are the four professional uniformed services in the Indian Armed Forces. Other organizations like paramilitary end inter-services also provide Indian Armed Forces with essential help.
So, the correct answer is Option D.
Note: Under the professional occupation is Indian Army, Indian Navy, Indian Airforce, and Indian Coast Guard. These four consist of professional uniformed services. Territorial Army either a profession or a source of employment. It provides self-employment in a civil profession.