This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Amino Acid Metabolism, Subject name: Biochemistry
[{'content': 'Serotonin is synthesized from- \nSelect and explain. \nA. Tiyrosine, B. Alanine, C. Tryptophan, D. Glycine', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Tryptophan o Hvdroxytryptamine (serotonin) is synthesized from tryptophan.", 'role': 'assistant'}]