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
Cart Wheel sign is seen in - 
Select and explain. 
A. ASOM, B. AOM, C. OME, D. CSOM
A: ASOM
Answer: A: ASOM 
Explanation: Otoscopy Signs for ASOM:

There is congestion of pars tensa
Leash of blood vessels appear along the handle of malleus and at the periphery giving it a cartwheel like appearance.
Transluscency is reduced.
Later tympanic membrane appears red and bulging with loss of landmarks.
Tympanic membrane is immobile n pneumatic ostoscopy