SOrry said Ki jagh per sahi hoga

Kya b. SC.  Ke bad b. Tech kr sakte h agar ha to ye karna said hoga

No,

For M.tech, Either you should have a Postgraduation Degree or Undergraduate Degree in a technical field that means B.tech.

You can not go for M.tech after your graduation however some universities still offer M.tech of 3 year duration after your Bsc.