Assumingly you are asking for good branch in Thapar University, the top branches you can opt for are Computer Science, Electronics and Mechanical Engineering. They have highest placmement records and good ROI. Though it also depends upon your interest.

Some of the companies which visit for placement drive are:

Microsoft IDC

Tata Motors

Make My Trip.com

Oracle Corporation

Naukri.com (Infoedge)

Larson & Tourbo ( ECC ).

You can even check the official placement details here .

Good Luck.