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': 'T cells in lymph node are present in: \nSelect and explain. \nA. Paracoical area, B. Mantle layer, C. Medullary cords, D. Coical follicles', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Paracoical area', 'role': 'assistant'}]