<prompt> A patient has carcinoma of right tongue on its lateral border of anterior two-third, with lymph node of size 4 cm in level 3 on left side of the neck, stage of disease is:N0N1N2N3  <response>: Remember:i . Any node 3 cm or less is N1 ii . Any nodes 3 cm and 6 cm is N2 whether it is ipsilateral, bilateral, contralateral, single or multiple.iii. Any node 6 cm is N3 . 