What should I pursue after B.Tech?

If you have already done B.Tech, you must go for PGDM, which is a regular AICTE approved program. It will fetch you better placement. The starting salary will not be less than Rs.6.5 to Rs.7 LPA.

If you want to continue with the technical line , M.Tech would be the best option or M.Tech plus PhD integrated else MBA if you want to go into a management role and work profile