Sir I study in 12class how i can get admission in b tech

IIT JEE is the National Level Exam for the admission of B.tech program. In order to get admission in IITs, NITs, IIITs you should have minimum 75% in class 12th as a General category & 65% as a reserved category or you should be in top 20 percentile.

There are University level & your state level Engineering entrance exam you can apply.

Good Luck!

First of all you need to identify that in which college you are interested to take admission for BTech there are various methods to join different colleges song college track their own entrance exam in summer based on joint entrance exam which is held by National testing agency so most of the college including prestigious IIT and it is are offered using the score of JEE advanced and JEE main so if you are interested in those college then you need to appear for JEE main and once you call you for it you need to appear for JEE advanced for other colleges they have their own exams and summer offer admission on the basis of JEE main score