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
A patient has carcinoma of tongue in the right lateral aspect with lymph node of 4 cm size in level 3 on the left side of neck, what is the stage ? 
Select and explain. 
A. N0, B. N1, C. N2, D. N3
C: N2
Answer: C: N2 
Explanation: None