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': 'Which component of the eye has a maximum refractive index – \nSelect and explain. \nA. Anterior surface of the lens, B. Posterior surface of the lens, C. Centre of the lens, D. Cornea', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lens has maximum refractive index among the refractive structures of eye. The refractive indices of the successive layers of lens increase from the periphery towards the nucleus. Therefore :-\n\n\nAnterior lens cortex → \xa0Refractive index is 1.386.\nPosterior lens cortex → Refractive index is 1.386.\nCentre of lens (nucleus) → \xa0Refractive index is 1.46.', 'role': 'assistant'}]