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: Social & Preventive Medicine
[{'content': 'Semi essential amino acids are – a)  Arginineb)  Lysinec)  Leucined)  Histidine \nSelect and explain. \nA. b, B. c, C. ac, D. ad', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Semi essential amino acids\n\nSemi essential amino acids are ones that can sometimes be made internally if conditions are right.\nArginine and histidine are such amino acids that can be converted from other amino acids.\n\nAlso know\nConditionally essential amino acids\n\nNon-essential amino acids become essential if their precursors are deficient.\nExamples → Tyrosine (derived from pheylalanine) and cysteine (derived from methionine).', 'role': 'assistant'}]