This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder, Subject name: Surgery
[{'content': 'Which of the following is a contraindication for medical management of gallstones? \nSelect and explain. \nA. Radiopaque stones, B. Radioluscent stones, C. Normal functioning gallbladder, D. Small stones', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Medical Therapy for Gallstones Medical therapy for gallstones utilizes bile acids: Chenodeoxycholic acid (CDCA) and ursodeoxycholic acid(UDCA) Prerequisites for Medical Treatment Drawbacks of Medical Treatment Radioluscent (cholesterol) stones Stones <10mm in diameter Functioning GB Non-acute symptoms Low rates of complete resolution High recurrence rate Not cost-effective (expensive drug has to be taken for upto 2 years ) Need of maintenance therapy to prevent recurrence', 'role': 'assistant'}]