Manipal

Dear Vamsi,
Your question is incomplete. You are doing MHM from which University and which semester? Most of the Universities will not entertain lateral entry from MHM to MBA as course contents are quite different. I am sure, SMU will also not allow such a move.

In terms of jobs, there is no good scope. However, you would like to pursue it as a PG program.

Hello,
TAPMI doesn't accept MAT scores for the admission process of PGDM program. http://www.tapmi.edu.in/admissions/admission-process/ Here's the source link, visit it for more details.

Hello Abhishek,
All these three universities are the top colleges for CSE. But in terms of rankings, VIT University tops the list. While SRM University ranks second and Manipal Institute of Technology is at the third.
So my preference order would be :
1) VIT University, Vellore
2) SRM University main campus
3) Manipal Institute of Technology, Manipal.
You may refer the links below for the complete list of placements :
1) https://manipal.edu/mit/why/placements.html
2) http://www.vit.ac.in/placement
3) http://www.srmuniv.ac.in/engineering/department-of-computer-science-engineering/placements.

Sikkim Manipal will be a better university as compared to Mumbai University for distance BCA.