This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'Ursodeoxycholic acid is a \nSelect and explain. \nA. Urinary Stone dissolving drug, B. Thrombolytic drug, C. Gallstone dissolving drug, D. Antifibrinolytic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Medical therapy of Gallstones Medical therapy of gallstones utilize bile acids : Chenodeoxycholic acid(CDCA) and Ursodeoxycholic acid(UDCA) Mechanism of Action : They inhibit HMG-CoA reductase, rate limiting enzyme for cholesterol synthesis, thus decreasing cholesterol saturation of bile They cause disruption of cholesterol from the stones by physicochemical means Ref: Sabiston 20th edition Pgno : 1494', 'role': 'assistant'}]