Dear Prasant,

According to you, you got 83,82, 63 marks in physics, chemistry, and mathematics. If you have passed class 12 with a minimum aggregate of 70% in PCM (Physics, Chemistry and Mathematics ) and you have qualify JEE Mains then your are eligible for TES(Technical Entry Scheme) exam.

To more information about TES(Technical Entry Scheme)-Dates, Eligibility, Fees :-

Army TES Application Form 2021 - Dates, How to Fill, Eligibility, Fees (careers360.com)

Hope this information helps you...

Best of luck :)