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
All of the following can be administrated in acute hypeension during labour EXCEPT: 
Select and explain. 
A. IV Labetatol, B. IV Nitroprusside, C. IV Hydralazine, D. IV Esmolol
B: IV Nitroprusside
Answer: B: IV Nitroprusside 
Explanation: Sodium Nitroprusside can cause severe hypotension. It is a powerful aeriolar and venodilator. It dilates blood vessels due to the release of NO -nitric oxide or EDRF It is contraindicated in eclampsia Sodium nitroprusside, though useful for HTN emergencies, is not suitable for pregnant women. (Ref- Essential of medical pharmacology K D TRIPATHI 8th Edition)