CA

According to me, BCA would be better. It depends on your choice of interest.

yes u can but Your visa should be Approved there are very less chances to get approval for visa

please define your location.

Yes. CA does not require mathematics as eligibility but to clear your CPT, you must brush up all mathematical concepts either by self or with tuition.

you should go for b.com general because they will provide you knowledge in commerce however b.com accounting and finance gives you knowledge in accounting and finance only.

after completing 2nd year you can give exam conducted by Staff Selection Commission in auditing. google for more information.

you can do CA after completing 12th. you need to qualify CPT exam that is basic or entrance exam for ICAI I must say there after you have to qualify IPCC both group then you are eligible for articleship to do work under CA to gain knowledge what CA actually do or gain knowledge in accounting and taxation after that you can do your finals exam. all this will take atleast 5 years or more.

Dear Divya.,
Firstly talking about these courses,
CA- Good option but as of now not so highly reputed as it use to be,neither placements are so good,coz every next student is going in CA.
No one guarantee's that you will be CA in a certain period of time it might take 4.5Years or more than what one can imagine.
BA LLB- A good option best part is you will be getting degree in 5years that's for sure. now talking about package that is upto your own skills.universities can assure you one thing that campus placements will be there but not job that is entirly upto your skills and abilities.
So these are few ground realities.
All the very best

M.Com and MBA itself are degrees, Go for certificate courses like FRM, Investment Banking, CFA from Simplilearn and Edupristine.