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': 'The class of amino acids that contains only non essential amino acids is \nSelect and explain. \nA. Acidic, B. Basic, C. Aromatic, D. Branched chain', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]