First categorize yourself,
ARE YOU A SCIENCE PERSON?
ARE YOU HUMANITIES LOVER?
ARE YOU INTO MONEY MATTERS AND COMMERCE?
Then choose what you like ...
opt IR as its your base of current affairs etc
IL is its sister subject go for it. 300 MARKS
Then choose between Gender studies or environmental science as both are interesting to study n will go good with your ZOOLOGY bkground. 100 marks
History gives conscience , US History is popular choice but if you like indo-pak go for it.100 marks
Last but not least look for a language or social science like psychology, sociology or anthroplogy , Punjabi, Persian or Arabic will add to the worth of this conglomeration.