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: ENT
Modified radical neck dissection type II 
Select and explain. 
A. Removal of level I - V lymph nodes with only spinal accessory nerve, B. Removal of level I - V lymph nodes with sternocleidomastoid muscle, C. Removal of level I - V lymph nodes with spinal accessory nerve and internal jugular vein, D. Removal of level I - V lymph nodes with sternocleidomastoid muscle and internal jugular vein
B: Removal of level I - V lymph nodes with sternocleidomastoid muscle
Answer: B: Removal of level I - V lymph nodes with sternocleidomastoid muscle 
Explanation: None