BCA

Yes, commerce student can apply and get admission for BCA.
Good luck.

You can take admission here. They provide good placement and faculty is also friendly and helpful. Good luck.

Yes, you can give SSC CGL and WBCS exam after completing your BCA from any institute. The eligibility for these exam is graduation only. Good luck.

It depends, where you want to take admission, like in Haryana you can get admission with this marks in colleges under Maharishi Dyanad University etc., but in Delhi it would be quite difficult.
Try entry through entrance exam options too.
In Rohtak, PGI medical check their criteria for admission I th

BCA is more Job Oriented as compared to B.Sc in Geography honors.

The first point is that your point of interest towards subject. BCA and B.Sc in Geography both have scope. You may choose any of them.

Yes, you can pursue BCA PROVIDES specialization programme like cloud technology and information security, UI&UX and any more.

Please visit this college predictor this will help you to choose best for you
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Hope this will help you
Thank you.