Hello Jayanth !!

You won't get reservation for any quota without any proper certification.

If you are son of ex army there is a reservation quota for you called CAP. You need to apply for it in your REGIONAL SAINIK WELFARE OFFICE which is nearest to your house. You and your father must go along with your father's army certificates. You will be given an certificate called CAP certificate which provides you 2 percent reservation in TNEA counselling.

ALL THE VERY BEST !!