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
[{'content': 'Vallecula sign is seen in ? \nSelect and explain. \nA. TB laryngitis, B. Vocal nodule, C. Inveed papilloma, D. Acute epiglottitis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Acute epiglottitis There are two impoant radiological signs in acute epiglottitis :? Thumb sign Vollecula sign", 'role': 'assistant'}]