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 band which disappears on muscular contraction is? \nSelect and explain. \nA. A, B. H, C. I, D. M or CM', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. H', 'role': 'assistant'}]