This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral Cavity, Subject name: Surgery
Treatment for stage T3 N1 of carcinoma maxilla is: 
Select and explain. 
A. Radiation therapy only, B. Chemotherapy only, C. Surgery and radiation, D. Chemotherapy and radiation
C: Surgery and radiation
Answer: C: Surgery and radiation 
Explanation: Ans. (c) Surgery and radiationRef: Bailey 26/e p718Carcinoma of Sinuses:* MC sinus involved - Maxillary Sinus > Ethmoidal sinus* Maxillary tumors spread to Submandibular Nodes (Level 1)* Ethmoid tumors spread to Jugulo-digastric (Level 2) nodes* Sinus cancers are common in people working in Furniture industry, Nickel Industry and leather industry.* Exposure to Mustard causes Sinus cancers.* More than 80% are Squamous cancers.* Treatment of SCC Maxillary sinus - Combined Surgery + RT