Civil Engineering

Hello Rika,
You may refer to the link below for the list of colleges offering Diploma in civil engineering at Dehradun:
https://www.shiksha.com/engineering/colleges/diploma-civil-engineering-colleges-dehradun

I am sorry brother but there is no such provision of getting an admission directly in the 3rd year of any course. But you can take admission in the 2nd year i.e. known as lateral entry, provided that you have completed your Diploma in the same branch and have the qualifying marks depending upon the colleges. Thank you.

First of all congratulation for getting a decent rank in JEE Advanced.
Now you should decide which branch you want to pursue. If you are interested in civil then you should surely go for IITD. If interested in metallurgical branch, then go for IITB and if still wants to do mechanical, go for Roorkee.

Jayawantrao Sawant College of Engineering, Pune.

Hello Vivek,
Both these institutions have a very good reputation and it's not possible to keep one above the other. Bot are supposed to have good faculty, placement cells and environment for studies. I would advise you to grab admission in any of these colleges if you are getting it.

Cannot be predicted. Depends on so many factors. But, a package of Rs.3.5 lac. Can be expected. Experience increases your pay scale.

Mechanical engineering is a major engineering and development sector, highly growing with good plateforms,
Manav Rachna University is best university in Delhi NCR with best infrastructure and faculty. The plus point of Manav Rachna University is that it offers the best placement with maximum up to 18 LPA.
http://manavrachna.edu.in/university/