Please suggest me which subject would be good for me to take as second optional

My Question is:

I am very new to the preparation for UPSC Civil services exams,My Question is related to the subject selection. I am taking geography as my 1st optional and I want suggestion on 2nd optional. I am choosing among Public Adm & Management. I am an MBA grad and have some background on Management subject while I heard Public Adm is easy to cover and Coaching & Books are easily available. Please suggest me which subject would be good for me to take as second optional.

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Nitin Khanna