Do B.Ed if you are interested  in teaching.
Do MBA if you are interested in business.
Do MCA if you are interested in programming.

Hello,
Other than MSc you don't have much option left with you.After passing B.Sc in my opinion you can do M.B.A so that you can get good job in Abroad if you interested.

For admission in top college you have to qualify the entrance exams like:-
C.A.T
M.A.T
G.M.A.T
R.M.A.T
S.A.T
S.N.A.P
X.A.T

• TOP M.B.A. COLLEGE:-

Indian Institute of Management, Ahmedabad

Indian Institute of Management, Calcutta (IIM C)

Indian Institute of Management, Bangalore (IIM B)

Indian Institute of Management, Lucknow (IIM L)

XLRI - Xavier Labour Research Institute, Jamshedpur

ISB - Indian School of Business, Hyderabad

FMS - Faculty of Management Studies, University of Delhi

Indian Institute of Management, Indore (IIM I)

Indian Institute of Management, Kozhikode (IIM K - Calicut)
Good luck.