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 is not antiemetic? 
Select and explain. 
A. Domperidone, B. Phenazocine, C. Cyclizine, D. Ondansetron
B: Phenazocine
Answer: B: Phenazocine 
Explanation: None