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': 'The study of the electrical activity of the muscle is: \nSelect and explain. \nA. EEG, B. EMG, C. Venn diagram, D. ECG', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]