This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'Which of the following drugs are believed to be effective in the treatment of post operative shivering \nSelect and explain. \nA. Ondansetron, B. Diclofenac sodium, C. Pethidine, D. Parcetomol', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pethidine is most effective drug for treatment of post operative shivering. Other drugs that can be used for this purpose are Clonidine Doxapram Ketanserin Alfentanil Refer anaesthesiology by Longnecker 1485', 'role': 'assistant'}]