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
Which pathway is responsible for contrast 
Select and explain. 
A. Magnocellular, B. Parvocellular, C. Koniocellular, D. None of the above
B: Parvocellular
Answer: B: Parvocellular 
Explanation: Magnocellular - Movement, depth, flickering.
Parvocellular - Colour, texture, contrast.