<prompt> Windswept deformity of the knee is seen in -OsteoarthritisRheumatoid arthritisAnkylosing SpondylitisPsoriatic arthritis  <response>: Ans. is b i.e., Rheumatoid arthritis Windswept deformity1. Knee:- A valgus deformity of one knee in association of varus deformity of other knee is know as windswept deformity. It is seen in: Rickets, Physeal oseochondromatosis, Hereditary dysplasia epiphyseal dysplasia of bone and Rheumatoid arthritis.2. Foot:- Deviation of all - toes in one direction usually laterally is known as windswept deformity. It is seen in Rheumatoid arthritis.3. Hand:- Deviation of all fingers usually medialy is know as windswept deformity. It is seen in Rheumatoid arthritis, SLE, and Jacouds arthropathy. 