This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'Which of the following constitute felty syndrome \nSelect and explain. \nA. Rheumatoid, ahritis plenomegaly, and neutropenia, B. Rheumatoid, ahritis, hepatomegaly, and neutropenia, C. Rheumatoid, ahritis, psoriasis, and anemia, D. Rheumatoid, ahritis, splenomegaly, and anemia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Felty's syndrome, also called Felty syndrome, (FS) is rare autoimmune disease characterized by the triad of rheumatoid ahritis, enlargement of the spleen and too few neutrophils in the blood Ref Davidson 23rd edition pg 796", 'role': 'assistant'}]