B.Tech

Sorry to say but you haven't cleared JEE Mains required cutoff. So, there is no way to get the best college for CSE. You may get admission in any private college on the basis of 12th percentage.

Techno India salt lake is the best college of India group. Placement is not very good but surely companies will come. You can choose it if you are not getting better college than this.

Sorry to say but you haven't cleared JEE Mains required cutoff. So, there is no way to get the best college for IT.
You may get admission in any private college on the basis of 12th percentage.

You can try in lower NITs or government colleges under JAC, Chandigarh and UKTU. Pantnagar University may be a good choice. You should try JAC, Delhi. Punjab Engineering College may be another good choice.

Almost all the government colleges provide B tech in mechanical engineering. I will name few government colleges which provide aeronautical engineering - Punjab Engineeing College, MIT-Chennai (Anna University).

You should try in lower NITs. I think you may get one in spot round. Chances are also there for Punjab Engineering College. You can try JAC Chandigarh counselling. UIET Punjab University is far better than lower NITs. Also, you will get LNMIIT, Jaipur and JIIT, Noida, sector-62.

Fee is high through management quota but you can take admission at minimum fee by talking to the official. I know a girl who talked to them and she is paying fee equal to regular students. So go and talk to them.

You can check the fee structure for different NITs by visiting their official sites.

You can take admission in NITs or any government college only if your PCM percentage is above 45%. But you are in reserved category so you can get admission anywhere.