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: Orthopaedics
Inversion injury at the ankle can cause all of the following except - 
Select and explain. 
A. Fracture tip of lateral melleolus, B. Fracture base of the 5th metatarsal, C. Sprain of Ext. Digitorum brevis, D. Fracture of sustentaculam tali
C: Sprain of Ext. Digitorum brevis
Answer: C: Sprain of Ext. Digitorum brevis 
Explanation: Structures damaged due to inversion injury

Peroneal tendon injury.
Avulsion fracture of tip of lateral malleolus.
Avulsion fracture of anterolateral surface of talus & calcaneum (sustentaculum tali).
Fracture of base of 5th metatarsal.
Lateral collateral ligament injury (anterior tato fibular > calcaneofibular > posterior- talofibular ligament).
Medial malleolus fracture.