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': 'Essential amino acid is ? \nSelect and explain. \nA. Alanine, B. Serine, C. Arginine, D. Proline', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Arginine Nutritionally Essential Nutritionally Nonessential Arginine Alanine Histidine Asparagine Isoleucine Leucine Asparatate Lysine Cysteine Methionine Phenylalanine Glutamate Threonine Tryptophan Valine Glutamine Glycine Proline Serine Tyrosine", 'role': 'assistant'}]