This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification and metabolism of amino acids, Subject name: Biochemistry
[{'content': 'Which of the following does not contain b-alanine? \nSelect and explain. \nA. Carnosine, B. Anserine, C. Homocarnosine, D. Pantothenic acid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Carnosine, Anserine, Pantothenic acid contain b- alanine in their structure Homocarnosine does not contain b alanine..', 'role': 'assistant'}]