This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2018, Subject name: Orthopaedics
[{'content': 'In rheumatoid ahritis, which types of cells are prominently present? \nSelect and explain. \nA. Lymphocyte, B. CD4+helper cells, C. Macrophages, D. Dendritic cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In rheumatoid ahritis, CD4+helper cells are prominently present.', 'role': 'assistant'}]