Being totally introvert or extrovert is not right. You should be having a mixed behavior and behave as per the requirement of the situation. You can say something like Sir, I behave according to the place and situation. Eg. Introvert personally and extrovert professionally.O r you can tell them that you a bit of both just like you described above.First, you are being honest and second, it shows that you can think outside the box -- given a choice of A or B, you can make C work.