Hi Akash,

            I am here to help you with your question. First of all, I am quite confused about your question. If you are asking about the best government colleges for Biotechnology then obviously I will suggest you the IIT's and NIT's. But if you want to know all other private and government colleges also then please visit the link https://university.careers360.com/colleges/list-of-biotechnology-universities-in-india

Any way you want to go for abroad after graduation then try to maintain a minimum percentage and it is better to know before itself what criteria should be satisfied to study further in Biotech in abroad so that you can be well prepared for everything. In most of the cases, colleges you studied doesn't matter much if you are quite good at other things. 

I hope this could help you.

All the best for your future.

Thank you.