This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
The stability of the ankle joint is maintained by all of the following, except: 
Select and explain. 
A. Plantar calcaneonavicular (spring) ligament, B. Deltoid ligament, C. Lateral ligament, D. Shape of the superior talar aicular surface
A: Plantar calcaneonavicular (spring) ligament
Answer: A: Plantar calcaneonavicular (spring) ligament 
Explanation: A i.e. Plantar calcaneonavicular (spring) ligament