This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Pariaeriole space is formed in spleen by \nSelect and explain. \nA. T lymphocyte, B. B lymphocyte, C. Rete, D. Macrophage', 'role': 'user'}, {'content': "Answer: A \nExplanation: Lymphocytes that aggregate around the central aery (mostly T-lymphocytes) create the periaerial lymphatic sheath(ref:Gray's Anatomy 40/e p1194)", 'role': 'assistant'}]