Every aspirant has different combination in mind. So, kindly go through the revised syllabus in detail and come up with your own combination. Only then could anyone on this forum guide you about your selection.

Revised Syllabus: http://www.fpsc.gov.pk/icms/admin/we...%20onwards.pdf

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“What we need in this country today is more courage and more belief in the things that we have.”- Thomas J. Watson