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: Anaesthesia
Which of the following drugs are believed to be effective in the treatment of post–operative shivering ? 
Select and explain. 
A. Ondansetron, B. Diclofenac Sodium, C. Pethidine, D. Paracetamol
C: Pethidine
Answer: C: Pethidine 
Explanation: "Unlike other opioid agonists, meperidine (pethidine) frequently terminates shivering regardless of the cause".
____ Morgan