This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is a vasoconstrictor: 
Select and explain. 
A. Bupivacaine, B. Procaine, C. Lidocaine, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: None