This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'Which of the following drug is a Potassium channel activator? \nSelect and explain. \nA. Trimetazidine, B. Ivabradine, C. Nicorandil, D. Detanonoate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Nicorandil1. It has vasodilating properties in normal coronary arteries.2. It reduces both preload and afterload.3. It also provides some myocardial protection via preconditioning by activation of cardiac KATP channels.4. Its significant reduction in relative risk of fatal and nonfatal coronary events in patients receiving the drug.', 'role': 'assistant'}]