Hello Shruthi,

Manipal institute of technology has its own paper for msap( Manipal school of architecture and planning) . In that paper you have to secure good rank as they have only 160-170 seats in it. But this number can change because it is a private university and autonomous so it can increase its seats any year according to the demand to earn more profit but usually this doesn't happen. 

Visit career360 website to know everything about architecture college available through jee mains paper 2 . There is also AAT for getting admission into IITs for b arch but it is entirely different from jee mains.

Hope this information helps you.