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
[{'content': 'Structures removed in RND dissection are all except: \nSelect and explain. \nA. Neck lymph nodes, B. Cranial nerve XI, C. Sternocleidomastoid, D. Vagus nerve', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Vagus nerveRef: Bailey - 26th Edition Page 720)* Structures removed in RND are:# Level 1-5 nodes# Part of Parotid gland# Submandibular gland# Spinal Accessory Nerve# Internal Jugular Vein# Sternocleidomastoid Muscle.', 'role': 'assistant'}]