This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: Surgery
The Nerve affected in Shoulder dysfunction Syndrome - A complication of Radical Node dissection is: 
Select and explain. 
A. Vagus nerve, B. Accessory nerve, C. Hypoglossal Nerve, D. Phrenic Nerve
B: Accessory nerve
Answer: B: Accessory nerve 
Explanation: Ans. (b) Accessory nerveRef: Bailey and Love Page 72Complications of RND:* Accessory nerve injury (Shoulder dysfunction syndrome)* Phrenic nerve injury* Thoracic duct injury* Cranial nerve injury* Carotid artery injury/Blow out* Soft tissue edema (usually after Bilateral RND)