Seizures at 38weeks gestation (557/1700)

A 28yo woman has been admitted at 38wks gestation. Her BP=190/120mmHg and proteinuria
+++. Immediately following admission she has a grand-mal seizure. What is the single most
appropriate initial management?
a. Diazepam IV
b. Fetal CTG
c. Hydralazine IV
d. Immediate delivery
e. Magnesium sulphate IV

answer: E