Hello Nagesh
Every branch is best ; each has its own speciality and importance.
It depends what upon your interest ; which branch and in which field you are interested .
As

• CSE - it is all about software nd coding
• ECE - you will learn about signal ; communication ; electronic devices
• Mechanical - you will learn about machines ; strength and materials and their working

And each field will depend upon other branch.
So good luck

Hello Nagesh,
The best engineering branch is CSE and E&C. It has the highest application in today's field with high placements and good packages. You can also choose your desired branch as per your choice. You can earn in any branch and every branch has a good scope.