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
Most important receptor involved in chemotherapy induced vomiting is : 
Select and explain. 
A. Histamine H1 receptor, B. Serotonin 5–HT3 receptor, C. Dopamine D2 receptor, D. Opioid µ receptor
B: Serotonin 5–HT3 receptor
Answer: B: Serotonin 5–HT3 receptor 
Explanation: None