Hey Aditya,

Based upon the rank that your sister has secured in JEE Mains paper 2(OBC) category it may be not possible for her to get into NITs and IITs for B.Arch course.The cutoffs are generally high with tough competition even among the reserved category students for seats within ranks of 1000.You may get seats under state quota cutoffs.It would had been  betterif you had mentioned your place of residence.Apply for other colleges under state quota where you have decent chances.

So if you are opting for IITs,NITs and CFITs you should try for another attempt in the next year and give your best.

Thank you.