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': 'Compound action potential is \nSelect and explain. \nA. Repetitive stimulation of single nerve fibre, B. Two nerve fibres stimulated simultaneously, C. Repetitive stimulation of mixed nerve fibre, D. Increase in strength of stimulus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: When a nerve bundle is stimulated, more than one axon may be excited. The electrical recording of combination of action potential is called compound Action Potential.', 'role': 'assistant'}]