Hello Jyoti,

Getting 99% in class 12 in arts or other streams may sound difficult but it isn't.  All that the candidate needs to have is dedication and hardwork.

First of all you need to get thorough with the ncert books that you have been studying in school. After that you can take reference and other guides and solve previous year question paper to get the idea of the pattern that's being asked and get thorough with all the topics.

I hope it helps and all the best and score good marks

Thank you