hi,

see mba and mtech is two different lines of study, where mba admission is based on cat/mat or any other management entrance test. mtech admission is generally based on gate score or the entrance test conducts by the respective college.

now coming to the two different courses, there is no liaison between them, so you can not change from one group to another in between studies. there is IMT -  119, and IMG -  69 . Candidates must qualify JEE (Joint Entrance Examination - Mains) and participate through centralised counselling held by JoSAA.