This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, 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: Depressing the tongue with a tongue depressor may show red and swollen epiglottis. Indirect laryngoscopy may show oedema and congestion of supraglottic structure. This examination is avoided for fear of precipitating complete obstruction. It is better done in the operation theatre where facilities for intubation are available. Ref: PL Dhingra 7th edition of Ear, Nose and Throat; Pg no 327