A company recruitment when there are Zhang san, Li shi, Wang wu, Zhao liu, Qian qi five people shortlisted. From the educational background, there are 2 masters and 3 phds, and from the sex, 3 men and 2 women. It is known that Li shi and Wang Wu are of the same sex, while Zhao liu and Qian qi are of different sexes; Li shi and Qian qi have the same educational background, but Wang wu and Zhao liu have different educational background. In the end, only one female master applied successfully.
?
Zhao liu