This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'The following instrument is used to measure \nSelect and explain. \nA. Pressure, B. Direction of wind, C. Humidity, D. Air cooling', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sling Psychrometer is used to measure both the dry bulb and wet bulb temperatures at the time. These temperatures are a measure of humidity content in the air.kata thermometer consisting principally of an alcohol thermometer used to measure air cooling.', 'role': 'assistant'}]