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
[{'content': 'Optic nerve consists of axons of: \nSelect and explain. \nA. Ganglion cells, B. Bipolar cells, C. Rods and cones, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Ganglion cells', 'role': 'assistant'}]