Indian Institute of Science Education and Research (IISER) is a chain premium research institute in India that has the tag of Institute of National Importance. The rigorous academics and cutting-edge research prepares students to become a world-class researcher. IISER offers a flagship five-year long BS-MS program along with other programs like PhD and Integrated PhD. https://www.sciastra.com/blog/opportunities-after-iiser-packages-placements-phd/