Hello Paulson,
Here is the list of best colleges/universities in Kerala for BBA:
1) Albertain Institute of Management
2) DC School of Management and Technology
3) Amity Global Business School
4) St Joseph's College Devagiri 
5) Jain University
6) Calicut University
7) St Teresa's College 
8) St Mary's College
9) Amrita School of Arts and Science 
10) Christ College Irinjalakuda

HOPE THIS INFO IS HELPFUL!!