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
Refractive index of nucleus and Cortex are Respectively 
Select and explain. 
A. 1.42 , 1.30, B. 1.39 , 1.42, C. 1.42 , 1.39, D. 1.30 , 1.42
C: 1.42 , 1.39
Answer: C: 1.42 , 1.39 
Explanation: Refractive index of nucleus and Cortex are Respectively are 1.42 and 1.39.