@sabah
u must go through syllabus of different subjects before selecting your optionals. i would suggest you specially go through the syllabus of subject like
SOCIOLOGY, GERNOULISM, PUBLIC ADMN, INDO PAK, these are general subjects and even a person of any feild of study can opt them. as u are student of international relations so u must opt international relation aswel. the subjects of regional languages are also scoring so go through the syllabus of that one as well but over all your interest counts more so opt the subects of your taste and dont lose more time on that ......select and start prepation because your more readings to subject give you more marks
wish u all the best
regards

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Engr.Aftab