What is your major?
What is your major?
What is the school subject that you are in charge of?
What is your major in university?
What did you specialize in at university?
What is your major?
What was your major in college?
What is your major?
What is your major?
What is your major in university?
What did you major in [What was your major] at the university?
What business are you in?
What is your mother tongue?