best branch for an air around 700-850 in iit.for someone with interest in research

Dear Vaibhav,

Most of the good branch at the IITs are core with B.Tech degrees. Thye best branch for you at this rank would be : -

1. Mathematics and computing, Delhi ( best )
2. Mechanical, Kharagpur
3. Chemical, delhi
4. chemical, kanpur

I think rather than going for reserch you should go for a good B.Tech degree from a good IIT. If you want to go for Research than opt for : -

1. Engineering Physics,( Delhi, Bombay, Kanpur )
2. Chemical  ( Bombay, kanpur, delhi )

Thank you.