What subject in CA ?

i am a student of b.com 2nd year.....i am so curious about my futher studies " c.a or m.b.a " i can do anything  to achieve  my goal and you guys are awesome and your comments too........i don't have much information about c.a because in my society no one is c.a " most of the guys are scared about c.a "..........so i love to be c.a like you guys .........without further due, i like to ask " in which subject i have to be smart to pursue c.a ....like " economic...?............and suggest me with some of your favorite books " e-books or else  physical books "...........thankssssssssssssssss a lottttttttttttttttttttttttttt............you guys are awesome...........