Hello aspirant...
You didn't mention the college name in which you want to take admission.There are various engineering entrance exam which is conducted to take admission in engineering college.Some of them are state based like WBJEE, Jharkhan Combined,OrissaJEE, MH-CET,etc and some are conducted on the central level.Jee mains is the more popular exam across our country.By this exam you can get admission in NIT, IIITS, CFTIS, GFTISetc.You can also get IITs by Jee Advanced which is conducted after mains.You can give exam in 12th appearing also.This is a chance for you,you can try.For registration process you should visit the official website of mains jeemain.nic.in
Hope it helps you.
All the best.