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: Unknown
[{'content': 'Which of the following  used for recording very low air velocity \nSelect and explain. \nA. Globe thermometer, B. Kata thermometer, C. Anemometer, D. Sling psychrometer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref. Foundations of Community medicine. Page. 41\n\xa0\nKata Thermometer is quiet sensitive to slight air movements as low as 10 feet per minute.\nUsually air velocity is measured by an instrument called anemometer, which consists of 4 hemp spherical cups attached to the ends of 2 Crossed metal arms.\nThe velocity of the wind is indicated on a counter called the cyclometer, placed in the anemometer box.', 'role': 'assistant'}]