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
Highest lymph-node involvement seen in - 
Select and explain. 
A. Glottic Ca, B. Subglottic Ca, C. Supraglottic Ca, D. Equal incidence in all
C: Supraglottic Ca
Answer: C: Supraglottic Ca 
Explanation: None