Respected seniors I am M. Sc in Physics. Kindly suggest which one of both is best choice for ce-2019.

If you're to opt only one of them and looking forward to know about a candid suggestion then I'm here to share my experiences with you. I would say please you to go for IR, physics is very unfaithful in CSS itinerary. It needs lots of efforts to have grasp on each and every topics of physics 100pc and numerous questions are always found undoable, I mean you won't be capable to reach to the exact answer of such questions. In short, Physics can fetch you top marks in very rare cases, I'm being Master in Physics, opted both of them in my CE-2018 attempt but did well in IR than my own background subject Physics. Yeah, if you've recently done Master in Physics and can solve out each and every unseen numerical equations, plus, also aware of all your Master course then don't let this opportunity to opt Physics. While on the flip side, IR is considered ever green subject and can obviously uplift you in World's politics, English Essay, CA, PA, US History and International law but Physics has no intersection with any other subject in CSS optionals at all. In this very subject, either you will do well or null because with every theory question there's attached one numerical question, whose solution is sometimes out of the approach, no matter whether you've done M. Phil in Physics.
P.s must solve out last 3 years physics papers before selecting it, if you can make it then must go for it otherwise stay away from your background subject, it has no mercy with its Master holders either.
GoOd LuCk

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All the quotes in the world won't make us a pious person, It's our actions that are going to be judged...!! !

Thanks farhan kaif sir
I.R looks me so attractive and charming but I once wanted to check out the credibility of both subjects.
Actually i thought that just by doing preparation simply as we did in B.Sc it will be done.
As you told your experience it looks so much hard choice as i have done M.Sc five years ago.
Thanks for your precious opinion. Surely now I will opt I.R.
REGARDS

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die like HUSSAIN (A S)

Check out, our Topper Maleeha Iesar's result. She also got more marks in IR than Physics with engineering background.
I'm staggering why physics teachers deem to prepare such an untoward paper. In past, Physics used to be a good subject to opt, even covering Fsc course was enough to have passing and optimum marks but, now, those days are gone my friend.

Anyhow GoOd luCk, still there might be some people who can perform good in this subject but it acquires lots of practice, time and energy.

__________________
All the quotes in the world won't make us a pious person, It's our actions that are going to be judged...!! !