question: Q:A 56-year-old man presents with constipation and trouble urinating for the past day. He says that he tried drinking a lot of water but that did not help. He also says that he has been tired all the time recently. Past medical history is significant for schizophrenia, diagnosed 3 months ago, and being managed on antipsychotic medication. Current medications also include sildenafil. The vital signs include blood pressure 80/45 mm Hg, respiratory rate 23/min, heart rate 86/min and temperature 38.7°C (101.7°F). On physical examination, the patient appears agitated and confused. Which of the following medications is the most likely cause of this patient’s presentation?? 
  {'A': 'Lithium', 'B': 'Haloperidol', 'C': 'Ziprasidone', 'D': 'Aripiprazole', 'E': 'Chlorpromazine'},