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': 'Bleeding ear discharge is mostly due - \nSelect and explain. \nA. Glomus tumour, B. Otosclerosis, C. Otitis media with effusion, D. Acoustic neuroma', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Glomus tumour Differential diagnosis of blood stained ear discharge :* ASOM* Acute mastoiditis* CSOM* Aural polyp* Granulations* Glomus tumor", 'role': 'assistant'}]