This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Semiessential amino acid - \nSelect and explain. \nA. Alanine, B. Valine, C. Histidine, D. Tyrosine', 'role': 'user'}, {'content': "Answer: C \nExplanation: Essential amino acids inclide leucine,isoleucine,lysine,methionine,phenylalanine,threonine,valine,tryptophan.Histidine is an essential amino acid.(Ref.PARK'S textbook of social and preventive medicine 21st edition page no.562)", 'role': 'assistant'}]