This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Nerve Injury, Subject name: Orthopaedics
[{'content': 'Arrange the following nerves according to incidence of their involvement in Supra-condylar fracture of humerus a. Median nerve b. Radial nerve c. Anterior interosseous nerve d. Ulnar nerve \nSelect and explain. \nA. c,a,d,b, B. c,a,b,d, C. a,c,b,d, D. d,a,b,c', 'role': 'user'}, {'content': "Answer: B \nExplanation: AMRU- Sequence of nerve involvement in SCF A- Anterior Interior Nerve M- Median Nerve R- Radial Nerve U- Ulnar nerve =Mechanism of injury-fall on outstretched hand(FOOSH) =TYPES- extension type most common (95-98%),flexion type less common (<5%). =Complications of supracondylar fracture of the humerus: Malunion leading to cubitus varus (gunstock deformity) Median nerve injury leading to pointing index sign Volkmann's ischemic contracture Vascular compromise - Rx- Urgent reduction in the OT and vascular status reassessed If perfusion is not restored, urgent exploration of the brachial aery is done", 'role': 'assistant'}]