A、Doctor and patient. B、Teacher and student. C、Husband and wife. D、Boss and secretary. A这是人物关系的判断。关键在于女士的话：headaches。所以应该是医生和病人的

M: Madam, What’s wrong with you?
W: My headaches are terrible. And I just feel sleepy.
Q: What is the probable relationship between the two speakers?