Deformity most commonly seen in primary osteoahritis of knee joint: (A) Genu valgum, (B) Genu recurratum, (C) Genu varus, (D) Procurvatum
Answer is C. In knee joint osteoahritis, medial joint space is affected earliest and causes assymetrical joint space narrowing This results in varus deformity Refer: maheswari 9th/e p 420