<prompt> Treatment of stage III carcinoma of oral tongue is:Wide excisionWide excision with supraomohyoid neck dissectionWide excision with supraomohyoid neck dissection and post-operative radiotherapyRadiotherapy delivering 7000 cGy  <response>: Stage III carcinoma tongue means tumour more than 4 cm in greatest dimension with no neck nodes or tumour of T1 2cm,T2 2-4cmorT3 4cm with a single ipsilateral node 3cm.Treatment will include wide excision of primary tumour with neck dissection and post-operative radiotherapy.All patients with stage III or stage IV carcinoma require post-operative radiotherapy in addition to surgery as this improves locoregional control of disease. 