Dear aspirant,

Yes you must opt for economics if you want to pursue a career in in commerce field like BBA which is a bachelors in business administration degree. You do not have to worry whether you have studied economics in grade 9 or 10 as you will get to know the economics from the basics in class grade 11th and 12th. Do not worry if you don't know the basics yet. Economics is also a must subject if you want to make a career in commerce field in many courses.

Hope this helps. Thank you.