Science

Yes you can, and I would suggest you study courses offered by IGNOU.

Such programs are offered by prominent distance learning universities such as IGNOU.

There won't be any issue in securing BBA admission after classn12th PCM. Science students are eligible to apply for BBA.

Yes, students from every stream can pursue BCA even if you haven't studied Maths or computer Science in your +2. The eligibility criteria is different for universities, but many of them will provide you admission for BCA. Don't worry, if you don't have any experience in programming, you'll still be

Yes, if you want to get admission into top universities and colleges for BCA then you definitely should study mathematics in your 10+2. As the eligibility criteria for these universities requires maths as a mandatory subject to be eligible for the admission. Also, you'll be studying maths in BCA too

Every time this is not true !

Yes, to be eligible for MCA a candidate needs to have Maths as a mandatory subject either in +2 or in graduation, which in your case is already satisfied. To be eligible for MCA you need to score at least 50% to 60% in graduation.

BCA course is primarily meant for non-Science stream students to get into IT. As Science stream students can pursue CSE or IT. So, yes Science stream students are also eligible for BCA but your primary focus should be to get into B.Tech (IT), as you'll have much more opportunities as compared to BCA