Hi Vishal,

According to your score 45 in JEE Mains it's very difficult to get any good college. As per last year the minimum cutoff for JEE Mains qualification category wise is

General (74), OBC (45), SC (25), ST (24), Pwd (-35).

You can predict your college from JEE Mains coleege predictor of career 360 the link is as bellows :

https://engineering.careers360.com/jee-main-college-predictor

all the best !!