This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
MgSO4 is/are indicated in 
Select and explain. 
A. Severe pre eclampsia, B. Gestational trophoblastic disease, C. Gestation diabetes, D. Placenta prae
A: Severe pre eclampsia
Answer: A: Severe pre eclampsia 
Explanation: The drug of choice for control and prevention of convulsion in eclampsia is magnesium sulphate ,usually given by Pritchard&;s regime.The mechanism of action thought to have a peripheral action at the neuromuscular junction,by competing with calcium for entry into the cells.It may also have central action. TEXT BOOK OF OBSTETRICS,Sheila Balakrishnan,2nd edition,page no.268