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: ENT
Vallecula sign is seen in ? 
Select and explain. 
A. TB laryngitis, B. Vocal nodule, C. Inveed papilloma, D. Acute epiglottitis
D: Acute epiglottitis
Answer: D: Acute epiglottitis 
Explanation: Ans. is 'd' i.e., Acute epiglottitis There are two impoant radiological signs in acute epiglottitis :? Thumb sign Vollecula sign