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
Drug of choice for Hypeension in eclampsia is 
Select and explain. 
A. Magnesium Sulphate, B. Nifedipine, C. Hydralizine, D. Labetolol
A: Magnesium Sulphate
Answer: A: Magnesium Sulphate 
Explanation: Refer kDT 7/e p 573 The drug of choice to treat and preventeclampsia is magnesium sulfate. Familiarity with second-line medications phenytoin and diazepam/lorazepam is required for cases in which magnesium sulfate may be contraindicated (eg, myasthenia gravis) or ineffective.