There is no specific  specialisation in M.B.A for B.Sc graduates.
It depends on your interest what subject you choose to study.

You have many options available like::

Information technology,
Hospital and Healthcare management,
International Business,
Tourism and hospitality,
Supply chain and logistics,
Financial markets,
Banking and insurance,
E-Commerce or you can go for MBA (HONS) also.



Hope this helps.
All the best!