In the word the best college for biomedical engineering would be MIT ( Massachusetts Institute of Technology ) . In India some good college for biomedical engineering would be

1. IIT Madras
2. IIT Delhi
3. IIT BHU

for getting into these IITS you will have to clear JEE ADVANCE with a good rank under 3k

next option , if you could not clear jee advance lets have plan b, some of the good colleges you can get into can be

1. NIT Rourkela
2. NIT Raipur
3. NIT Allahabad
4. NIT Kurukshetra

to get into these college you need to qualify JEE MAINS ,

There are also many colleges other than national institution which are famous for bio medical engineering

• MODEL ENGINEERING COLLEGE (KERALA)
• TKM INSTITUTE OF TECHNOLOGY (KERALA)
• Manipal Institute of Technology
• SRM Institute of Science and Technology
• VIT Vellore - Vellore Institute of Technology

hope this clarifies your doubt ,

best wishes for your future