Which of the Following Psychiatric Patients Is Most Likely to Be

Which of the following psychiatric patients is most likely to be violent?

A) Tom, who has paranoid schizophrenia and regularly takes his medication
B) Bill, who has schizoaffective disorder and regularly smokes crack
C) Joe, who has schizoaffective disorder and three prior arrests for petit larceny
D) Sam, who has paranoid schizophrenia and regularly smokes cigarettes