Which is the best branch in engineering?

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.

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

Computer science engineering is considered to be the most preferred branch of engineering. Below is an article. Check it for more information: https://www.shiksha.com/b-tech/articles/highest-paying-engineering-branches-know-top-recruiters-salaries-offered-blogId-8228