<prompt> The stability of the ankle joint is maintained by the following, exceptPlantar calcaneonavicular spring ligamentDeltoid ligamentLateral ligamentShape of the superior talar aicular surface  <response>: A. i.e. Planter calcaneonavicular ligament Calcaneonavicular Spring ligament is most impoant ligament for maintaining the median longitudinal arch of foot but has nothing to do with stability of ankle joint because it is not around ankle joint 