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.
The successful candidate is Zhao Liu.