i want to be a ca so my question is should i do 5 years of ca graduation after my 12th or i should do b.com first and then c.a???

after 12th you can directly do CA. If you have the caliber and you can cope with the stress of two degrees simultaneously, you can do b.com also side by side. but still you should prefer ca over the b.com.

its better 2 take direct admission in the course for wastage of time