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
Refractive Index of cornea is about 
Select and explain. 
A. 1.3, B. 1.33, C. 1.37, D. 1.42
C: 1.37
Answer: C: 1.37 
Explanation: 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