Hello there!

The eligibility criteria for SSC-CGL says that candidate must have completed a bachelor degree in any discipline from any recognised university.

So, you can do bachelor's in any subject.

If you want more time for preparation, you can simply take admission in BA, B.Tech. or simple B.Sc.

I suggest you to take admission in the subject you are interested in so that you can complete graduation effortlessly.

Hope it helps.

Stay safe.

All the best !!