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': 'Cart Wheel sign is seen in: \nSelect and explain. \nA. ASOM, B. Glomus, C. OME, D. CSOM', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (a) ASOM(Ref. Hazarika, 3rd ed., 149)In Glomus "rising sun sign" or "red reflex" is seen.In Otitis media with effusion (OME) TM appears dull, retracted and sometimes bluish.In CSOM the TM will be perforated', 'role': 'assistant'}]