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: Pathology
A patient is diagnosed with cancer. Size of the lesion is found to be 5 cm in diameter and metastasis is found with single ipsilateral lymph node. The stage according to TNM staging is: 
Select and explain. 
A. Stage 1, B. Stage 2, C. Stage 3, D. Stage 4
C: Stage 3
Answer: C: Stage 3 
Explanation: Without T4 → N1 always gives stage III only, with T4,N1 gives stage IV. N2 /N3 always gives stage IV.
T3 implies Tumor >4 cm.