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: Surgery
[{'content': 'Fibres which transmit fast pain from pulp are \nSelect and explain. \nA. Aα, B. Aγ, C. Aβ, D. Aδ', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]