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apollo hyderabad is the institute which does gives the prep material.
but there are no classess as such
i would suggest you go and visit hyd.apollo if you have the means... you could start working there... and prepare for the exam at the same time. that is an option
it will give you enough contact with people who have taken and cleared the exam
but you will need to have your basics crystal clear.
the exam is not easy.
part b and part c are way easier to clear