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
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 
Select and explain. 
A. CPZ, B. Amitryptiline, C. Haloperidol, D. Pimozide
B: Amitryptiline
Answer: B: Amitryptiline 
Explanation: B i.e. Amitryptiline