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': '"Rising sun" appearance is seen in \nSelect and explain. \nA. ASOM, B. CSOM, C. Glomus tumor, D. Acoustic neuroma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rising sun appearance is seen when a glomus tumour arises from the floor of the middle ear in otoscopy. Sometimes, the tympanic membrane appears bluish and maybe bulging. Ref: Dhingra 7th edition pg. 121', 'role': 'assistant'}]