Which branch of engineering is the best?

It depends upon your interest. If you like electronics field then you should pursue B.Tech in electrical and the same goes for other branches. All the branches are good.

Cs or mechanical engineer

Best branches in terms of rank: 1. Computer Science & Engineering/IT 2. Mechanical Engineering 3. Electrical & Electronics Engineering 4. Electronics & Communication Engineering 5. Civil Engineering 6. Chemical Engineering 7. Architectural engineering

All the Engineering fields have lot of scope & equal Job opportunities. If you like software development , coding , testing, hardware processing then you can go for CSE or if you have interest in mechanical then go for mechanical engineering. The main deciding factor should always be your area of in