This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
Which of the following drug is safe in pregnancy? 
Select and explain. 
A. Sodium nitroprusside, B. Hydralazine, C. ACE inhibitors, D. Indapamide
B: Hydralazine
Answer: B: Hydralazine 
Explanation: Ans. B. HydralazineSafe antihypertensive in pregnancy - beta blockers (labetalol), methyl dopa, clonidine, nifedipine, hydralazine, prazosin.