Hii Nishant. 90.88 %ile means 90.88% of students who appeared for this exam have scored less than or equal to you. That means 9.12% are ahead of you. And this year approximately 3.93 lakh students have appeared for the exam. So, your rank can be calculated as 9.12% of 393000 i.e. ~35841. Even with OBC, there is no chance of getting CS at VJTI, PICT, Walchand Sangli. But, yes you can try for ramdeobaba etc.