Hello. This is a quite good question. But frankly speaking it greatly depends upon your interest which branch you would like to choose. Now the thing is that Core branches like Mechanical ,Chemical and Civil don't offer ready money of 12 lakhs or above. They will give you around 8 lakhs in the beginning which will increase in further years to 15 lakhs or above. But nowadays the students are running after ready money so they for IT Placements irrespective of what their branches are. So all the branches have their own scope. Now it depends upon your interest. If you chose Mechanical or Civil ,still you might go for IT Placements at the end of four years or you can chose to be placed in the core Mechanical Field.

Computer Science Engineering (CSE) , Information Science (IS) OR Information Technology (IT) & Electronics and Communication Engineering (ECE)..
All three of these have good scope in future and if you do great, these are also responsible to get you some high paying jobs, avg salary is around 4-5 lpa depending upon ur college and efforts.
GOOD LUCK !!