This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Subject name: Ophthalmology
Refractive index of vitreous humor - 
Select and explain. 
A. 1, B. 1.3, C. 14, D. 1.336
D: 1.336
Answer: D: 1.336 
Explanation: Ans. is 'd' i.e., 1[?]336 Refractive indexMediumAirCorneaAqueous humourLensVitreous humorRefractive index1[?]0001[?]3761[?]3361[?]386-1-406 1[?]336