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: Pharmacology
[{'content': 'Ankle edema caused by calcium channel blockers is prevented by \nSelect and explain. \nA. Propanalol, B. Adrenaline, C. Ropinirole, D. ACE inhibitors', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Calcium channel blockers can lead to ankle edema caused by precapillary dilation of vessels.\nACE inhibitors or Angiotensin Receptor Blockers can Prevent the edema by causing postcapillary dilation of vessels.', 'role': 'assistant'}]