<prompt> A patient had 3 cm mass over the lower lip and a single lymph node measuring 3 cm was present on contralateral side. TNM staging of this lip carcinoma will be:T1 N2aT2 N2bT2 N2cT1 N2b  <response>: Tis: Carcinoma in insites.T1: Tumor 2 cm.T2: 2-4 cm.T3: 4 cm.N1: Single ipsilateral Lymph node 3 cm.N2a: Single ipsilateral Lymph node 3 cm but 6 cm.N2b: Multiple ipsilateral Lymph node of size 6 cm.N2c: Bilateral or contralateral Lymph node of size 6 cm.N3: Any Lymph node of size 6 cm or pericapsular invasion. 