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
[{'content': "In ERG 'A' waves corresponds to \nSelect and explain. \nA. Rods and cones, B. Nerve bundleftlayer, C. Aifact, D. Pigment epithelium", 'role': 'user'}, {'content': 'Answer: A \nExplanation: ERG A wave Activity of rods and cones B wave Bipolar cell C wave Retinal pigment epithelium(RPE)', 'role': 'assistant'}]