Marks are based on you rank and not just on your marks and if you ask me what is the difference between them so I must tell you that ranks are subjected to change as they depends upon various factors like number of applicants fill the form, number of applicants finally appeared in the exam, number of questions asked in the exam, difficulty level of the exam, performance of the candidate, previous year's cut offs trends availability of seats in the institution so first of all you need to find out your rank and you said you are a obc girl so the girls quota and obc quota will help you to get the best college in your range after you know your rank , by the help of our upsee rank predictor you can also see what college you might get with this rank but keep in mind that the final results and cut offs can be different I am providing you the link for both predictors.

https://engineering.careers360.com/upsee-rank-predictor

https://engineering.careers360.com/upsee-college-predictor

Good luck!!