Can I pursue B.Sc after scoring less in maths?

Yes, you can pursue B.Sc. Getting less marks doesn't mean you are not up for it unless cut-off becomes a hindrance.

Yes, you have many opportunities in B.Sc without maths. Choose the subject which suits you best. Go for it.

You can opt for paramedical courses which do not need math.

Yes, if your eligible for any particular B.Sc institute then you can pursue B.Sc in different fields even if you've scored less marks in mathematics.

If you meet the eligibility criteria of universities for B.Sc, you can apply for admission in the same to pursue B.Sc. B.Sc in physics has good opportunities and scope for growth.