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: Orthopaedics
[{'content': 'In Rheumatoid ahritis, which type of cells are prominently present ? \nSelect and explain. \nA. B cells, B. T cells, C. Macrophages, D. Dendritic cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: * Synol lining or intimal layer: Normally, this layer is only 1-3 cells thick. In RA, this lining is greatly hyperophied (8-10 cells thick). * Primary cell populations in this layer are fibroblasts and macrophages REF : MAHESHWARI 9TH ED', 'role': 'assistant'}]