π-type talents refer to compound talents who possess at least two professional skills and can integrate multiple knowledges. The two vertical fingers below π represent two professional skills.

March analysis: The key word in the question is "possess at least two professional skills". Item A: Mr. Zhuang has two professional skills in science and management, which meets the definition; item B: Ms. Zhang only has one professional skill: hairdressing, which does not meet the definition; item C: Mr. Cao only has one professional skill: clothing, which does not meet the definition; item D: Mr. Zhao only has one professional skill: chef, which does not meet the definition. So the answer is A.