Hello Sushant

As all the branch is best because it's all depends upon you that in which field you are interested.

Every branch is interlink with each other .

But when we compare the packages and the facility it is in computer science.

But if a person do not  interested in coding and software than he will definitely fail in it.

So if you are interested in coding and software than go to cs.

For mechanical : machines and their working is taught.

Civil: construction and building and strength etc.

Electrical: circuit ; signals ; current ; electrical equipment etc.

So each field has its own speciality and importance.

So choose your branch very wisely .

Good luck