How to score 90+ in board exams (arts) stream?

Study hard with full sincereity. Clear your doubt areas. Play physical games, eat well and sleep well. These days it is not difficult to score above 90. Just have to be disciplined in your study schedule. All the best.

Mostly toppers belong to arts stream. First of all, you don't need any other books for your exams except NCERT. Solve some question banks. Focus on your studies. And, work hard Good luck.