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: Surgery
Structures preserved in Radical Neck Dissection is : 
Select and explain. 
A. Vagus nerve, B. Submandibular gland, C. Sternocleidomastoid, D. Internal Jugular Vein
A: Vagus nerve
Answer: A: Vagus nerve 
Explanation: Ans. is 'a' i.e., Vagus nerve