This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'Urea,Creatine and Nitric oxide are synthesized from? \nSelect and explain. \nA. Alanine, B. Arginine, C. Aspaate, D. Glycine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: AMINO ACID DERIVED PRODUCTS Phenyl alanine Tyrosine->Melanin,Dopa,Dopamine,Norepinephrine,Epinephrine Tryptophan Niacin,Seratonin->Melatonin Histidine Carnosine,Histamine,Anserine Glycine Heme Glutamate GABA,Glutathione Arginine Urea,creatine,Nitric oxide Serine Ethanolamine,choline Lysine cadaverine Reference: Harpers illustrated biochemistry 30th edition', 'role': 'assistant'}]