To join PARA Special Forces, you need to join the Indian Army first.  Only the successful and eligible candidates  who attain 100% marks in Physical Fitness tests and 50% marks in Written Test and are in merit will be asked to think an option of joining the ELITE PARA Regiment.

There are no special entrance exams for enrolling into the Special forces , You should give NDA  / CDS/ any other equivalent exam that will enroll you into the Indian Army first . Then there will be the exam conduced if you perform well in the Army

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