This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Otosclerosis, Subject name: ENT
[{'content': "Schwartz sign is seen in -(PGI 98) \nSelect and explain. \nA. Otosclerosis, B. Meniere's disease, C. ASOM, D. CSOM", 'role': 'user'}, {'content': "Answer: A \nExplanation: (A) Schwartz sign also known as Flemingo's pink sign, is a diagnostic indicator for otosclerosis, a disease of the bones of the middle or inner ear. In clinical examination of the ear drum, increased vascularity of the promontory may be seen through the ear drum.", 'role': 'assistant'}]