Hey Devendra,

There is a huge difference between B. Tech and M. Tech as they are two different degrees.

Btech is for graduation and M. Tech is for post graduation.

Without Btech you cannot go for M. Tech

B. Tech is a 4 yrs course, whereas M. Tech is 2yrs course

So first complete B. Tech so then you can opt for M. Tech.

All the best!