I'm currently in Class 12 in Kolkata and want to pursue BBA and then MBA from Abroad. Which colleges would you prefer outside India?

Since you haven’t mentioned which country you want to go to, here is a list of universities that you can target to pursue your BBA and MBA from abroad:

Harvard University
INSEAD
London Business School
Stanford University
Massachusetts Institute of Technology (MIT)
Bocconi University
University of Pennsylvania
University of Cambridge
University of Oxford
HEC Paris School of Management
BBA International Different entrance examinations, such as the SAT, ACT, GRE, and GMAT, are used to determine admission. Bachelors of Business Courses in India cost INR 28.63 lakh on average for the first year (top 20 universities)

The average annual living expense is INR 6.11 lakh.