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: Pediatrics
Steeple sign is characteristis of ? 
Select and explain. 
A. Acute epiglotitis, B. Laryngotrancheobronchitis, C. In both, D. None of above
B: Laryngotrancheobronchitis
Answer: B: Laryngotrancheobronchitis 
Explanation: Ans. is 'b' i.e., Laryngotrancheobronchitis