This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
The drug of choice for prevention of seizures in a patient with severe preeclampsia is : 
Select and explain. 
A. Phenytoin, B. Magnesium sulphate, C. Diazepam, D. Nifedipine
B: Magnesium sulphate
Answer: B: Magnesium sulphate 
Explanation: None