Sir I’m getting M&C at IIT Kanpur, Guwahati, Kharagpur, BHU

And aerospace integrated course at IIT Kharagpur.

Which of these would be a better option? Please arrange them in decreasing order.

depends on your interest in the branches. m&c is part of cse and aerospace is part of mech and electrical. you need to decide the better branch. say you like aerospace, your first choice should be aero kgp. among the m&c, kan>kgp>bhu>guw. so choose first according to branch and then follow the precedence. But if you want to do upsc and cat after these 4 years, better take m&c as it is lighter and takes just 4 years to complete. you get to sit for almost all software and cs placements (no electronics and hardware of course), so it would be better.

all the best