Hey Aryan

77 percentile means that nearly 23 percent students are ahead of you and score more than you.

And if you calculate approximately rank it comes out to be nearly more than 2 lakhs.

And within this rank you will get Thapar as per the previous year cut off trends.( But according to your exact rank which can be shown only after April exam and results your branch may vary).

But I would suggest you to work and study for the April exam and try to score more so that you may get even better college than THAPAR

Good luck