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': 'What is the color of the normal tympanic membrane? \nSelect and explain. \nA. Pearly white, B. Gray, C. Yellow, D. Red', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Such a simple appearing question can also confuse us with its options. Most of the texts say that tympanic membrane is pearly grey in color.', 'role': 'assistant'}]