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
Light house sign in seen in ASOM in which stage? 
Select and explain. 
A. Stage of suppuration, B. Stage of hyperaemia, C. Stage of resolution, D. Stage of pre-suppuration
A: Stage of suppuration
Answer: A: Stage of suppuration 
Explanation: 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