This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': "Schwaz sign is seen in: \nSelect and explain. \nA. Meniere's disease, B. Otosclerosis, C. Lateral sinus thrombosis, D. Cholesteatoma", 'role': 'user'}, {'content': "Answer: B \nExplanation: Schwaz 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'}]