This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Otitis Media, Subject name: ENT
Ca Wheel sign is seen in: 
Select and explain. 
A. ASOM, B. Glomus, C. OME, D. CSOM
A: ASOM
Answer: A: ASOM 
Explanation: In ASOM, the TM appears very red and congested. Since the vessels on the TM run radially this hyperaemic appearance is also known as Ca wheel appearance of TM