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: Social & Preventive Medicine
[{'content': "The effective temperature of 'comfo zone is% \nSelect and explain. \nA. 25-26.9deg C, B. 27-29deg C, C. < 19degC, D. 19-23deg C", 'role': 'user'}, {'content': "Answer: A \nExplanation: Arm. is 'a' i.e 25-26.90 C", 'role': 'assistant'}]