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
Which of the following is used to measure humidity? 
Select and explain. 
A. Kata thermometer, B. Globe thermometer, C. Sling psychrometer, D. Anemometer
C: Sling psychrometer
Answer: C: Sling psychrometer 
Explanation: Kata thermometer - measures cooling power of air Globe thermometer - measures radiant heat Sling Psychrometer - measures humidity Anemometer - measures air velocity Ref: Park, 21st Edition, Pages 688 to 691.