IIT Roorkee - Indian Institute of Technology

There is an official link of there placement records, take a look at it.
Link: https://www.iitr.ac.in/departments/ME/pages/Academics+Placement_Record.html.

IIT-R placements are better than IIT-G. IIT-G has more peaceful environment and nature as an advantage. Academics is much easier at IIT-G. The administration is better, alumni base is stronger, and campus is around 2.5 times bigger and beautiful. The research facilities are better. Professors at IIT-R are more distinguished and experienced. It has location disadvantages in terms of transport facilities. Go for IIT-R mechanical engineering, if you ask me.

All these are top IITs. You can go in any of these, All these have best placement in various fields. You should opt according to your score if you have chances like these.

It is just fake news that you have got and nothing else. Both the institutes are participating in JoSAA 2018, as usual.

Mentioned college are best on their own place. But, branches are different that you have entered. So, choose branch first which want to pursue. You may go for DTU if you have interest in computer. IIT Kharagpur is also option for you. Metallurgy is also better branch.

Yes, if you qualify JEE Advanced with good rank.

DTU CSE is more better than IIT, Roorkee. CSE placement is also very good in DTU.