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
"Rising sun" appearance is seen in 
Select and explain. 
A. ASOM, B. CSOM, C. Glomus tumor, D. Acoustic neuroma
C: Glomus tumor
Answer: C: Glomus tumor 
Explanation: 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