This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Which is found in coex of lymph node? \nSelect and explain. \nA. Lymphocyte aggregates, B. Billroth cords, C. Macrophages, D. Connective tissue', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Within the coex there are several rounded areas that are called lymphatic follicles or lymphatic nodules.Each nodule has a paler staining germinal centre surrounded by a zone of densely packed lymphocytes Inderbir Singh&;s human Histology Seventh edition Pg 132', 'role': 'assistant'}]