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: Anatomy
Ligament suppoing the head of talus ? 
Select and explain. 
A. Talonavicular ligament, B. Cervical ligament, C. Plantar calcaneonavicular ligament, D. Deltoid ligament
C: Plantar calcaneonavicular ligament
Answer: C: Plantar calcaneonavicular ligament 
Explanation: Plantar calcaneonavicular ligament Spring ligament (Plantar calcaneonavicular ligament) connects the calcaneum with the navicular bone. o However, its principal job is to provide a sling for the talus, to suppo the head of talus (though it has no attachment to talus). This aids in suppoing the weight of the body. Weaknes or lengthening along this ligament can cause flat foot.