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': 'Axillary Nerve Injury is least likely in: \nSelect and explain. \nA. Shoulder dislocation, B. Fracture proximal humerus, C. Intramuscular injection, D. Improper use of crutch', 'role': 'user'}, {'content': 'Answer: D \nExplanation: AXILLARY NERVE INJURY (C5-C6) * Injured in fracture of surgical neck humerus, shoulder dislocation (anterior and inferior) and intramuscular injections. Improper use of crutches - radial nerve injury(crutch palsy) AXILLARY NERVE INJURY Motor symptoms Deltoid muscle palsy Loss of rounded contour of shoulder -flattened Shoulder Weakness of abduction (15deg-90deg) Teres minor palsy Sensory symptoms Lateral cutaneous nerve of arm Sensory loss over lower half of deltoid (regimental badge area).', 'role': 'assistant'}]