hi,

cmat exam is for admission in mba courses, students who have already graduated or in final year are eligible for cmat entrance test, however there is some certain university has bba entrance test for 3 years bba courses after 10+2,

you may follow the below link to know details,

https://bschool.careers360.com/articles/top-5-bba-entrance-exams-know-exam-pattern-eligibility-criteria-and-selection-process

bba course is perfect for you if you have future goal to do mba courses in marketing.