All of the following maintain the stability of ankle joint except

ANKLE JOINT:- Synol joint of hinge variety.Aicular surfaces:-Upper-lower end of tibia including medial malleolus, lateral malleolus, and inferior transverse tibiofibular ligament.Lower-aicular areas on upper, medial and lateral aspects of talus. Stability of ankle joint:- 1. Close interlocking of the aicular surface. 2. Strong collateral ligaments on sides. 3. Tendons that cross the joint 4 in front-Tibialis anterior, EHL, EDL Peroneus teius.3 posteromedially-Tibialis posterior, flexor digitorum longus,FHL .2 lateral-peroneus longus and brevis. The depth of the superior aicular socket is contributed by 1. Downward projection of medial and lateral malleoli.2. Inferior transverse tibiofibular ligament. {Reference: BDC 6E page no.148}