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: Physiology
[{'content': 'Lowest threshold potential in a motor nerve fibre is at: \nSelect and explain. \nA. Dendrite, B. Body, C. Axon hillock, D. Axon', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Axon hillock', 'role': 'assistant'}]