Hello Divy Pandey
Parachute Commandos are experts who come under a separate wing of the Indian Army. Those who are part of the Army can become Para commandos through competitive tests and by way of promotions.
They have to undergo 6 months training in the Special Forces regiments and 3 months training for normal parachute regiments. There will be physical, mental and psychological tests carried out as part of the training. Those who successfully complete the hard training program can become Parachute Commandos within the Army.
Hope it helps you.