HI Shreya,

It actually seems tuff to tell whether you can get into best of IITs or not. 

But you should reconsider your thought of 

Cause Branch does matters in long run. You might feel sad of not opting the one you feel you are more comfortable with. I understand that brand name matters but what if you loose your interest in such branch during your engineering time.

Thin of this and then go for any college. I'm sure if you are keen to go into IITs you'll surely get into one if you replan your next year.

All the best