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': 'Kata thermometer measures \nSelect and explain. \nA. Air temperature only, B. Air temperature, humidity and air movement, C. Air temperature and humidity, D. Air velocity only', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Kata thermometer measures ‘cooling power of air’: Cooling power of air comprises of\n\n– Air temperature\n– Humidity\n– Air movement\n\nKata thermometer readings as indices of thermal comfort:\n\n– Dry kata reading > 6 (Thermal comfort)\n– Wet kata reading > 20 (Thermal comfort)\n\nNowadays it is used to record low air velocity.', 'role': 'assistant'}]