Hello Sonu, with 89.3 percentile your rank should be around 110000. with this rank, it's pretty hard to get computer science in any college which admits students on the basis of JEE mains score. You can try in some of the colleges in your state because you can avail 50% home state quota there or you can try giving other entrance exams like WBJEE, COMEDK, MHCET, VITEEE, UPESEAT and then decide accordingly.