This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'Refractive Index of cornea is about \nSelect and explain. \nA. 1.3, B. 1.33, C. 1.37, D. 1.42', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Refractive index of the cornea (1.37), Refractive index of the aqueous humour (1.33), Refractive index of the crystalline lens (1.42), and Refractive index of the vitreous humour (1.33) Ref:Khurana 4e pg: 26', 'role': 'assistant'}]