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
C - wave in electroretinography is due to 
Select and explain. 
A. Rods & cones, B. Muller cells, C. Bipolar cells, D. Retinal pigment epithelium
D: Retinal pigment epithelium
Answer: D: Retinal pigment epithelium 
Explanation: A wave - Rods & cones.
B wave - muller cells & Bipolar cells.
C wave - RPE.