The stability of the ankle joint is maintained by all of the following, except -: (A) Plantar calcaneonavicular (spring) ligament, (B) Deltoid ligament, (C) Lateral ligament, (D) Shape of the superior talar articular surface
Answer is A. Calcaneonavicular ligament or spring ligament is a powerful ligament attahced posteriorly to the calcaneum and anteriorly to the navicular bone. So it is obvious that it will not participate in the formation of ankle joint.