Hi, since you have said that you got have 4215 rank in your JEE Mains Paper 2 so it quite sure that you can get into NIT with the rank you have secured. Infact you have SC reserved Category as well. So I can assure you that you can surely be able to get admission into NIT;
Etc.
You can also take help of Careers360 College Predictor to predict your college on behalf of your rank you have got(link mentioned below); https://engineering. careers360.com/jee-main- college-predictor?icn=QnA&ici= qna_answer
Good Luck.
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