CA

CA is no doubt a great choice to be a Professional Accountant but the study time is lengthy. I would suggest you to better go for International Professional Accountant courses like CMA (US). Being a BBM, you will be eligible to write the CMA exams. It has 2 papers and great demand in MNCs of India and abroad.

Go for CA, CS doesn't require much efforts to clear, like that of CA. you can do CS side by side of CA course.

you can do CS or CMA along with CA. CA along with LL B is good option. provided it should not clash with your CA articleship timings

Full Form of CA (there are many, but some of them are here, and others can get on Internet)
Computer architecture - Information Technology
Concurrent Audit- Banking
Channel Aggregation- Computer and Networking
Communication Application -Computer and Networking
Conformity Assessment- Computer and Networking
Chartered Accountants - Business Organization

not very tough,just you need to work on basic concepts along with your +2 exams and stay confident.

Dear Vinutha,
I suggest you to visit Website of Institute
ICAI.Org
You will find each and every information over there, and if you still have any doubts after reading information over there feel free to ask me.
all the best

Dear Vinutha,
CA isn't about practical or theoretical subjects it's a mix of accountancy, Law, Tax, Cost, Finance, Strategy , which is the reason of it's reputation.
so it doesn't mean that you are strong in practicals then you won't be able to manage with theory but yes a strong part will give you bit edge, but overall you can have a go with.
all the best

Dear Vinutha,
Recommendation is to go for CA instead of ICWA, Reason being scope and opportunities what CA's have in comparison to CWA.
Secondly CA have more reputation than a ICWA though both are professional courses but a CA can Perform work of a cost accountant but a cost accountant can't perform work of a CA.
all the best

Dear Sarthak,
First of all Maths isn't compulsory to pursue CA, Secondly taking maths or eco is matter of your interest because non of these subjects will be there in CA, except in CPT , But that is of basic level so not to worry about.
So whether to take maths or eco it's upto you this decision of your neither going to give you any edge in CA nor any disadvantage.
good luck