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: Medicine
All the following are useful intravenous therapy for hypeensive emergency except 
Select and explain. 
A. Fenodopam, B. Uradipil, C. Enalaprilat, D. Nifedipine
D: Nifedipine
Answer: D: Nifedipine 
Explanation: Ref Harrison 19 th ed pg 1626 Nifedipine is used as an oral/sublingual agent . It is not available for intravenous administration.