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: Microbiology
[{'content': 'False about YδT-cells \nSelect and explain. \nA. Constitute about 5% of total T-cells, B. Lack both CD4 and CD8 molecules, C. Usually found in gut mucosa, D. Part of acquired immunity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: YδT-cells are part of innate immunity.', 'role': 'assistant'}]