This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': "T-cell mature in:(1991) \nSelect and explain. \nA. Peyer's patches, B. Lymph node, C. Thymus, D. Bursa of fabricius", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans: c (Thymus)Ref: Ananthanarayan Micro, 7th ed, p. 123 & 6th ed, p. 117, 115; Fig. 15.4', 'role': 'assistant'}]