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: Biochemistry
[{'content': 'Carnosine is a major constituent of \nSelect and explain. \nA. Kidney, B. Muscle, C. Brain, D. Adipose tissue', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Carnosine (α-alanyl-histidine) is a dipeptide that is present in large quantities in muscle tissue.', 'role': 'assistant'}]