This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Medicine
[{'content': 'Which of the following is a K- channel opener? \nSelect and explain. \nA. Ranolazine, B. Nicorandil, C. Verapamil, D. Lignocaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Option B: used in the management of chronic stable Angina. Option A: used to reduce the O2 consumption of the hea', 'role': 'assistant'}]