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
Sausage digits is seen in 
Select and explain. 
A. Lyme disease, B. Osteoahirits, C. Psoriatic ahiritis, D. None
C: Psoriatic ahiritis
Answer: C: Psoriatic ahiritis 
Explanation: 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)