This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A patient with oral cancer involving mandible is managed by: 
Select and explain. 
A. Chemotherapy alone, B. Radiotherapy alone, C. Resection followed by radiotherapy, D. Radiotherapy followed by resection
C: Resection followed by radiotherapy
Answer: C: Resection followed by radiotherapy 
Explanation: When ever Mandible is involved, resection is done before radiotherapy. If radiotherapy is given first it can lead to radionecrosis of Mandible.