This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Which of the following drug is used for the reversal of cerebral vasospasm and infract following subarachnoid hemorrhage 
Select and explain. 
A. Nimodipine, B. Amilodipine, C. Diltiazem, D. Verapamil
A: Nimodipine
Answer: A: Nimodipine 
Explanation: Refer katzung 11e p 202 Nimodipine is used to decrease problems due to a ceain type of bleeding in the brain (subarachnoid hemorrhage-SAH). Nimodipine is called a calcium channel blocker. The body naturally responds to bleeding by narrowing the blood vessel to slow blood flow.