<prompt> An edentulous patient had carcinoma of the oral cavity infiltrating into the lower alveolar margin. All the following are possible treatment options except:Segmental mandibulectomyMarginal mandibulectomy with removal of outer tableRadiotherapyCommando  <response>: c RadiotherapyRef. Cummings, 6th ed., 1372Since radiation to the mandible carries risk of osteoradionecrosis, carcinoma lower alveolus mandible is dealt with surgically in all the stages.Chemotherapy may be given in T3 T4 tumours. 