ms mah rafa you can opt from following subjects; let me mention science subjects are the best option available to you. if you prepare them good, they are going to make you fly in the final merit list.

1. anatomy,
2. physiology,
3. statistics,
4. ethics and psychology,
5. logic and elements of philosophy.

secondly, be different. don't go for those subjects which every tom, dick and harry will be taking.

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Ability is nothing without opportunity.