You can definitely pursue a Bachelor of Business Management (BBM) after completing your 12th in Arts. There's no restriction on the stream you studied in 12th grade for pursuing BBM.

Many colleges and universities offer BBM programs open to students from all backgrounds. The course focuses on developing business and management skills, which can be acquired irrespective of your previous academic stream.

So, if you're interested in a career in business and management, BBM is a viable option for you.