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 'comfort zone is' – \nSelect and explain. \nA. 69–76°F, B. 77–80° F, C. 83–85° F, D. 86–90° F", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Comfort zone\n\nComfort zones may be defined as the range of corrected effective temprature over which the majority of adults feel comfortable.\nComfort zones evaluated in India : -', 'role': 'assistant'}]