This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'A PATIENT WITH DIABETES AND COPD DEVELOPED POST OPERATIVE URINARY RETENTION .WHICH OF THE FOLLOWING IS USED FOR SO TERM TREATMENT TO RELIVE SYMPTOMS ? \nSelect and explain. \nA. BETHANECOL, B. METHANICOL, C. TERAZOSIN, D. TAMSULOSIN', 'role': 'user'}, {'content': 'Answer: A \nExplanation: BETHANECOL : ITS A M3 RECEPPTOR ANTAGONIST ITS USES ARE : FOR CONSTIPATION., PARALYTIC ILEUS, POST OPERATIVE URINARY RETENTION . REF : KD TRIPATHI 8TH ED', 'role': 'assistant'}]