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
Most impoant feature to diagnose severeb pneumonia- 
Select and explain. 
A. Cyanosis, B. Chest indrawing, C. Nasal flaring, D. Fast breathing
B: Chest indrawing
Answer: B: Chest indrawing 
Explanation: Ans. is 'b' i.e., Chest indrawing o The only sign for severe pneumonia is chest indrawing.