This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: ENT
[{'content': 'Light house sign in seen in ASOM in which stage? \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: In the stage of supperation of ASOM, pus formation occurs, hence in this stage pulsatile otorrhea or light house sign in seen. Ref : Dhingra book of ENT 7th ed', 'role': 'assistant'}]