Hey there

Yes you can do Bachelor of Commerce computer application course after completing 12th class in science group. However you have to complete 10 + 2 Class with at least 45% marks. Admission process in different colleges and Universities are other merit based or entrance exam based. The top institutes offering Bachelor of Commerce computer applications course are mentioned below:

• Loyola College
• Women's Christian College
• Sacred heart College

For more: https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/colleges/shaheed-bhagat-singh-government-degree-college-ashta/bcom-computer-applications-course&ved=2ahUKEwi9z6v0pfzzAhU3wjgGHdhdCRUQFnoECA0QAQ&usg=AOvVaw2bCHb0i0gAY2aLmuVAnpHj