This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
In ERG 'A' waves corresponds to 
Select and explain. 
A. Rods and cones, B. Nerve bundleftlayer, C. Aifact, D. Pigment epithelium
A: Rods and cones
Answer: A: Rods and cones 
Explanation: ERG A wave Activity of rods and cones B wave Bipolar cell C wave Retinal pigment epithelium(RPE)