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: Ophthalmology
[{'content': 'Refractive index of the cornea is – \nSelect and explain. \nA. 1.33, B. 1.37, C. 1.42, D. 1.45', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The refractive index is 1.376.', 'role': 'assistant'}]