This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Lighthouse sign is seen in \nSelect and explain. \nA. Stage of suppuration, B. Stage of hyperaemia, C. Stage of resolution, D. Stage of pre-suppuration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lighthouse sign is seen in Stage of suppuration of AOMStages of AOM-1. Stage of hyperemia/Congestion- Cawheel appearance of TM2. Stage of exudation/Pre suppuration3. Stage of suppuration- Lighthouse sign (Pinpoint perforation)4. Stage of resolution/complicationsRef: Hazarika; 3rd ed; Pg 149', 'role': 'assistant'}]