CBSE 12th

A minimum of 75% or 20 percentile in your board (for general) and 65% or 20 percentile in your board is required in standard. XII, to be eligible for B.Arch course at BIT Mesra.

Yes you are eligible for bams college.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
check the link for exact information about the college available to you.

Yes, there are degree courses in VFX, animation, etc., which are offered by Arena, IGNOU and MAAC. But to get a list of affiliated colleges with Mumbai University, you will have to visit Mumbai University's official website.

Yes it seems possible that you might get admission here in the subsequent rounds of counseling.

Please visit the following link to get exact information
https://www.shiksha.com/humanities-social-sciences/course/b-a-hons-in-economics-jamia-millia-islamia-jamia-nagar-delhi-110411
though generally maths is not a requirement

Hi, you will have to a score a minimum 50% to be eligible to sit for the Masters programme. But score much more than that to get the admission.

Can you please mention the full form of BM?

Yes you can apply for this course but you will have to meet certain eligibility criteria and appear in the relevant exam to get admission in the tally course.

Yes, you can do the CA course although it would be a bumpy ride for you. The greatest advantage of choosing science is that you are eligible for sitting in any exam.

Best law college in India is NLU Bangalore then all other NLU follow. NLUs except NLU Delhi take admission through CLAT and NLUd takes admission through AILET. Other universities like BHU, JMi, AMu, ILI, GGSIPU, NMIMS, GLC Mumbai are also good all these provide 5 year law through their own exams. Pvt universities like amity is also good. The main problem with NLUs is that they are very expensive and students often take education loans, but after graduation since they all give excellent placements it all gets recovered.