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: Pharmacology
[{'content': 'Drug indicated in case of subarachnoid hemorrhage: \nSelect and explain. \nA. Nimodipine, B. Amlodipine, C. Diltiazem, D. Verapamil', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. NimodipineNimodipine is cerebro selective calcium channel blocker. Given in patients with hemorrhagic stroke. Nicardipine also have similar effects. This drugs reverse the cerebral vasospasm.', 'role': 'assistant'}]