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
Radical dissection of neck includes all except - 
Select and explain. 
A. Cervical lymph nodes, B. Sternocleido mastoid, C. Phrenic nerves, D. Internal jugular vein
C: Phrenic nerves
Answer: C: Phrenic nerves 
Explanation: None