Yes. Depends on what is your optional subject. If you have pcmb then it is better to join computer cource for a month which will give you a basics of bca or computer programming.

Hello Harsh,
It's great to hear from you that you are wishing to persue degree of BCA after completing your higher secondary education. BCA basically stands for Bachelor of Computer Application. It is a there year undergraduate degree course in the field of computer application. You can opt for higher studies is MCA. Basic eligibility criteria for admission to the course is higher secondary education with mathematics. So you can definitely do BCA after completion of your 12 th.
So best of luck for your bright future. Thanks.