This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Medicine
[{'content': 'A frost bite patient is rewarmed at what temperature? \nSelect and explain. \nA. 37? C, B. 42? C, C. 44? C, D. 46? C', 'role': 'user'}, {'content': "Answer: A \nExplanation: Gently rewarm frostbitten areas. Soak the frostbitten areas in warm water -- 99 to 104 degree F (37? to 40 ?). If a thermometer isn't available, test the water by placing an uninjured hand or elbow in it -- it should feel very warm -- not hot. Rewarming takes about 30 minutes. Stop the soaking when the skin becomes its normal colour or loses its numbness", 'role': 'assistant'}]