This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rheumatoid Ahritis, Subject name: Medicine
[{'content': 'Which of the following is false about Rheumatoid ahritis? \nSelect and explain. \nA. Often associated with hyperophy of synol membrane, B. Rheumatoid nodules are often painless, C. Ligament fibrosis is common early in the disease, D. The disorder cause permanent deformity', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Option A: Yes, synol membrane damage it is example of erosive ahritis causing deformities like z line deformity, or swan neck deformity etc. Option B: Yes, Rheumatoid nodules are painless. Option C: In R.A. ligament laxity is a presentation but not ligament fibrosis.', 'role': 'assistant'}]