This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries to the Leg, Ankle & Foot, Subject name: Orthopaedics
Sudden inversion of foot leads to rupture of which tendon? 
Select and explain. 
A. Deltoid ligament, B. Anterior talofibular ligament, C. Posterior talofibular ligament, D. Spring ligament
B: Anterior talofibular ligament
Answer: B: Anterior talofibular ligament 
Explanation: Ans. is 'b' i.e., Anterior talofibular ligament * The lateral collateral ligament is commonly sprained, mostly so the anterior talofibular component* Structures damaged due to inversion injury.i) Peroneal tendon injury.ii) Avulsion fracture of tip of lateral malleolus.iii) Avulsion fracture of anterolateral surface of talus & calcaneum (sustentaculum tali).iv) Fracture of base of 5th metatarsal.v) Lateral collateral ligament injury (anterior talo fibular > calcaneofibular > posterior- talofibular ligament).vi) Medial malleolus fracture.