Hello Nikhil,
It is generally believed that only students of commerce should pursue CA course. However, CA being a very practical course, the students from science and arts streams can equally benefit and make a successful career. Students of science and arts stream have to make extra efforts in order to understand some complex accounting nuances and have to get basic knowledge of various management topics. But it can be easily concluded that students of science and arts streams can be successful CAs, if they are ready to toil.
GOOD LUCK!!!