The best colleges rank wise are as follows:-

Rank College Name

1 MIT Muzaffarpur

2 BCE Bhagalpur

3 BCE Bakhtiyarpur

4 DCE Darbhanga

5 GCE Gaya

6 NCE Chandi Nalanda

So go with DCE darbangha and you must keep it in the mind that all what you get is only due to your own struggle. college isnt going to give you much for it.