This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'A 60 year old male comes to casuality with acute retention of urine since 12 hours. On examination there was distended bladder. His son gives a history of taking some drug by the pateint. Since 2 days as he is suffering from depression. The most likely drug is \nSelect and explain. \nA. CPZ, B. Amitryptiline, C. Haloperidol, D. Pimozide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Amitryptiline', 'role': 'assistant'}]