hello sir, I got 16000 obc rank in iit mains exam and overall rank is 60000. what are the chances of my advance exam rank and which college

Hello,
You must be aware of the fact that admission in IITs is based on your rank in JEE Advanced. JEE Mains rank is for admission in NITs and JEE Mains marks is considered as a qualifying criteria for appearing in JEE Advanced examination. If you have cleared JEE Mains cutoffs and you appear for JEE Advanced, then your admission in IITs is not affected by JEE Mains rank. So just prepare well for JEE Advanced and perform well. Your rank in JEE Advanced will decide your branch in any IIT.
All the best!