B.Com

Good morning,
Yes, it is possible to get admission in B.Com after class 12th in science or maths or commerce or even arts.
There is no such restriction.
Go ahead with the desired subject.
Thanks and all the best.

IGNOU is best of all distance universities.

M.Com is the best option if you really want to pursue Master's degree in the commerce field. Every Master's degree adds a great value to your resume during an interview. A skilled person is always needed than a less educated one. How much you educate yourself makes you equally skilful in that field.

Yes, you can surely do MBA after completing B.Com. The minimum eligibility criteria for MBA is UG with 50%.

With 46% you can't apply to any university abroad, forget Canada.