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
Supra omohyoid dissection of lymph nodes is called as 
Select and explain. 
A. Selective neck dissection, B. Modified radical neck dissection, C. Radical neck dissection, D. Functional neck dissection
A: Selective neck dissection
Answer: A: Selective neck dissection 
Explanation: Supra omohyoid is removing level I to IV lymph nodes. It is a selective LN dissetion.