yes you can do bba llb   but you have to give a clat paper and check the eligiblity then fill your form for upcoming clat exam start preparing .best of luck have nice day.

Hey.
Yes, no matter from which stream you are you will be eligible to take admission in the course of BBA LLB. There will be no restriction based on stream for admission in this course.
In most of the colleges the first 3 years you study both BBA/BA subjects with Law. And in the last 2 years you will study only law subjects
In case of BBA, the subjects are
Business Mathematics, Business Organization, Organizational Behavior, Business Economics, Statistics, Human Resource Management, Financial management, Marketing Marketing, Risk ManagementAnd Other such subjects involved in BBA along with law subjects like Criminal law, Civil Law, Contracts, torts, business law, property law, Company law etc.

These subjects are manageable. Even if you belong to another stream you will not have much problem in coping up with these. Obviously in the beginning you will be a little behind the people from commerce background but you will be able to manage very easily.
ELIGIBILITY CRITERIA-
The eligibility criteria for the course in same in most of the colleges. It ranges between a minimum aggregate of 45 marks in your 12th boards to be eligible from any stream. So even a Science, Arts, Commerce graduate can pursue both BBA LLB

Yes, you can choose to pursue BBA LLB from any college if you clear its admission tests and eligibility criteria. However, this course will be totally different from your current stream and you will have to put in a lot of effort. Most colleges do not require you to have a humanities or commerce background to pursue this course but some interviewers might ask you about this change of stream and you have to make sure your reason is solid enough and not so shallow.