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
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: C i.e. Sprain of extensor digitorum brevis Inversion injury of ankle cause peroneal tendon sheath (not extensor digitorum brevis) sprain. Inversion Injury to ankle may lead to - Lateral collateral ligament injury (anterior talo fibularQ> calcaneofibular > posterior - talofibular ligament) - Peroneal tendon injuryQ - Avulsion fracture of tip of lateral mallelusQ - Avulsion fracture of anterolateral surface of talus & calcaneum (sustentaculum tali)Q. - Fracture of base of 5th metatarsalQ.