Hello sayed,
According to me, you have to go for M.Tech from IITS OR IISC.
otherwise you can also go for MBA from top college.
You can choose course according to your interest.
If you have interest in MBA then go for MBA, if you want to be a professor then go for m.tech.
It's totally your choice.
Both options are good. For job purpose MBA is good.
Good luck.