Who Among the Following Is Most Likely to Be a Hypochondriac

Who among the following is most likely to be a hypochondriac?

A) Andrea, who attributes her headache to not getting enough sleep
B) Tina, who refuses to go to the doctor to treat her flu
C) Mike, who constantly thinks that he is seriously ill despite doctors telling him he is fine
D) George, who believes he is perfectly fine and ignores symptoms of a major illness