Hi,

Every subject has its own scope and limits.

If you do bsc in any of the above subject you can do msc in that subject. After that you can work as a junior research fellow or you can pursue ph.D

After bsc you can give civil services exam.

If you compare the three subjects, all the subject have similar scope but physics has a slightly higher edge then the other two subjects in academics because demand of physics teacher is higher as compare to chemistry or math teaher.

However if you join tutoring as a career then it is easy to find maths student as most of the student find it a difficult subject.

Hope you find this information helpful.

Hello there!
All of the three subjects, physics, chemistry and maths have equal scope. No subject us better than the other. The scope of the subject depends upon your interest in that particular subject.
You can go for any of the three subjects in which yiu have genuine interest without worrying about its scope. However mere Bsc wont help you, you will have to do post graduation as well whichever subject you choose.
Hope this helps!
All the best :)