Butonniere deformity occur due to -a) Flexion of Proximal interphalangeal jointb) Flexion at Distal interphalangeal jointc) Extension at Distal interphalangeal jointd) Extension at Metarcarpophalangeal jointe) Flexion at Metarcarpophalangeal joint: (A) a, (B) ac, (C) ad, (D) b
Answer is B. None