This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
[{'content': 'The only neurons showing action potential are \nSelect and explain. \nA. Amacrine cells, B. Ganglionic cells, C. Cells of lateral geniculate body, D. Rods and cones', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Their axons form optic nerve and leave the retina, hence they are the only output cells from the retina. They are the only retinal cells capable of producing an action potential Ref: Ganong 25th ed/page 178', 'role': 'assistant'}]