This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
Drug of choice for imminent eclampsia is 
Select and explain. 
A. Hydralazine, B. Labetolol, C. MgSO4, D. Methyldopa
C: MgSO4
Answer: C: MgSO4 
Explanation: Labetalol and alpha-methyldopa are safe in pregnancy.Labetol is rapid acting and used in hypeensive emergencies.MgSO4 prophylaxis is used in imminent eclampsia and eclampsia.Ref: KDT 7th ed P 573