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
[{'content': 'Which of the following injuries is likely to cause a severe vascular damage?a) Closed posterior dislocation of kneeb) Elbow dislocation c) Fracture middle 1/3rd of clavicled) Tibial plateau fracture \nSelect and explain. \nA. ac, B. ab, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Both elbow dislocation (mostly posterior) and knee dislocation (posterior) can cause severe vascular injury.\n\n"A knee dislocation is particularly concerning because of the damage that often occur to the important nerve and\nvascular structures around the knee joints. In fact, vascular injuries can be so severe that the leg viability can be\nthreatened to the point of requiring emergency vascular surgery" ..................................\xa0Essentials of arthopaedics.\n"Posterior dislocation of elbow may cause brachial artery injury which may result in severe compartment syndrome\xa0and VIC" .....................\xa0Basics of orthopaedics\n"Arterial and nerve injuries although uncommon, are a risk with dislocation e.g. of knee, elbow and hip..................... Merk Manual.', 'role': 'assistant'}]