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': 'Neonatal thymectomy leads to - \nSelect and explain. \nA. Decreased size of germinal center, B. Decreased size of paracoical areas, C. Increased antibody production by B cells, D. Increased bone marrow production of lymphocytes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Thymectomy in neonates results in a modest but significant decrease in T-lymphocyte levels, but there is no compromise in immune function.T-cells origin from paracoical areas Reff: www.mayoclinic.com', 'role': 'assistant'}]