Step 1: The word psychiatry comes from the Greek roots psyche (mind or soul) and iatros (healer), meaning medical treatment of the mind.
Step 2: Johann Christian Reil, a German physician, coined the term psychiatry in 1808. So Johann Reil is the correct answer.
Step 3: The other names contributed differently. Eugen Bleuler coined schizophrenia, autism, and ambivalence. Philippe Pinel is famous for the moral treatment of the mentally ill and for unchaining patients, but he did not invent the word psychiatry.