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
Psychrometer Psychrometer is used to measure - 
Select and explain. 
A. Humidity, B. Air velocity, C. Room temperature, D. Radiant temperature
A: Humidity
Answer: A: Humidity 
Explanation: Ans. is 'a' i.e., Humidity Humidity is measured by o Dry and wet Bulb hygrometer o Sling psychrometer o Assmann psychrometer o Air velocity is measured by anemometer. o Radiant temprature is measured by Globe thermometer. o Room temprature is measured by bulb thermometer.