This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
Commando's operation is for 
Select and explain. 
A. Mandible, B. Radical mastectomy, C. Leg amputation, D. Oral cancer
D: Oral cancer
Answer: D: Oral cancer 
Explanation: It is en-bloc removal ,which includes wide excision of primary tumour with hemimandibulectomy and neck block dissection,examples : it is done usually in carcinoma of tongue or floor of the mouth ;it is a composite resection of primary tumour ,mandible and radical neck dissection(RND) SRB,5th,451.