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
Best graft for alveolar cleft surgery
(Or)
Patient with cleft palate graft taken from 
Select and explain. 
A. Posterior iliac crest, B. Anterior iliac crest, C. Clavicle, D. Rib
A: Posterior iliac crest
Answer: A: Posterior iliac crest 
Explanation: None