Hello dear,

If you want to do BSc in physics then I want to tell you that BSc physics and Natural science are both different fields. BSc physics is a 3 year programme where you can study about only phsyics. When you do BSc in physics you can dive down into the physics.

But at the other hand if you studied Natural science so it is 2 to 4 year course. In Natural you have to study math, physics, chemistry, biology as well.

But you are eligible to give your CDSE as well as AFCAT exams by studying natural science as well BSc in physics the only thing is at last you can score more than 60 percent in your course. Because 60 percent marks in compulsory in both CDSE and AFCAT.

All the very Best.