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
Which of the following Osteotomy is carried out for mandibular deformity 
Select and explain. 
A. Inverted 'L' Osteotomy, B. 'C' Osteotomy, C. Intraoral sagitall split Osteotomy, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None