Hello Ayushi,

With a GATE score of 402 in the OBC category, securing admission to M.Tech programs in Biotechnology at IITs may be challenging. For instance, IIT Delhi's 2022 cutoff for Biomedical Engineering was 650 for OBC candidates.

It's advisable to check the specific admission criteria of each IIT and consider applying to multiple institutions to increase your chances.

Hope it helps !