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: Anatomy
[{'content': 'Winging of scapula is due to paralysis of...... nerve: \nSelect and explain. \nA. Long thoracic, B. Axillary, C. Radial, D. Median', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. Long thoracic nerve Winging of scapula is excessive prominence of medial border of scapula seen in injury to long thoracic nerve (n. of bell)Q due to paralysis of serratus anteriorQ', 'role': 'assistant'}]