Ideally an MBA from a b-school is most preferable, however some of the IITs are relatively older than the new IIMs, which given them an upper hand in terms of industry relation and placements.
Some of the IITs in the top tier category are
IIT Bombay (SJMSOM) would definitely be considered a great place to study. You can also check out https://mockat.com/infozone/college/top-business-schools/ for more B-schools to consider.
Hope this was helpful.
I want to know if MBA from IITs is good or should I aim to join B-schools only.
Please give clarity.