This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Nerve commonly injured in classical radical neck neck dissection is? 
Select and explain. 
A. Long thoracic nerve, B. Thoracodorsal nerve, C. Dorsal scapular nerve, D. Accessory Nerve
D: Accessory Nerve
Answer: D: Accessory Nerve 
Explanation: The main disability that follows the Classical Radical Neck Dissection is weakness and drooping of the shoulder due to paralysis of the trapezius muscle as a consequence of excision of the accessory Nerve. Reference : Bailey & Love, 27th Edition, page no = 758.