Is that your headmaster?用Yes,he is.回答还是Yes,it is.

题目

Is that your headmaster?用Yes,he is.回答还是Yes,it is.
是一道单选题,本人觉得都可以耶,哪个答案更合适些?

答案

用yes,it is.
如果问的是is he your headmaster,才回答,yes he is.