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
The effective temperature of ‘comfort zone’ is 
Select and explain. 
A. 69 – 76°F, B. 83 – 85°F, C. 77 – 80°F, D. 86 – 90°F
C: 77 – 80°F
Answer: C: 77 – 80°F 
Explanation: None