If you are doing the BSc in Economics, Physics, chemistry, Mathematics, Computer Science, Biotechnology, Biology, zoology etc then you can do your Integrated PhD program (MSc+PhD) from the Indian Institute of Science, Bangalore by qualifying the examination of IIT-JAM.

To know more about the IISc visit the link below:

https://www.careers360.com/university/indian-institute-of-science-bangalore

To know more about the IIT JAM examination, visit the link below:

https://university.careers360.com/exams/jam

I hope this answer helps. All the very best for your future endeavors!