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': 'Sausage digits is seen in \nSelect and explain. \nA. Lyme disease, B. Osteoahirits, C. Psoriatic ahiritis, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: Wright and Moll classification for psoriatic ahropathyClassic involvement of DIP and PIP joints (erosion of terminal tufts - Acro osteolysis with associated changes in nail bed)Ahritis Mutilans (opera glass deformity)pencil in cup deformitySymmetrical polyahritisAsymmetric oligoahritis (sausage like digits) Spondyloahropathy(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 418, 426, 432)", 'role': 'assistant'}]