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. 77–80° F, C. 83–85° F, D. 86–90° F
B: 77–80° F
Answer: B: 77–80° F 
Explanation: Comfort zone

Comfort zones may be defined as the range of corrected effective temprature over which the majority of adults feel comfortable.
Comfort zones evaluated in India : -