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: Surgery
Which of the following does not cause vomiting in a post-operative patient: 
Select and explain. 
A. Ingested blood, B. N2O, C. Acetaminophen, D. Opioids
C: Acetaminophen
Answer: C: Acetaminophen 
Explanation: It is an analgesic and antipyretic drug which is used for the management of postoperative pain in a surgical patient. By reducing the postoperative pain, it reduces the incidence of post-operative nausea and vomiting.