This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lower limb, Subject name: Anatomy
All of the following maintain the stability of ankle joint except 
Select and explain. 
A. Cruciate ligament, B. Shape of the bones, C. Tendons of muscle which cross the joint, D. Collateral ligament
A: Cruciate ligament
Answer: A: Cruciate ligament 
Explanation: 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}