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: Dental
Which of the following is the most common orofacial malformation that produces malocclusion? 
Select and explain. 
A. Cleft lip and palate, B. Ectoderrnal dysplasia, C. Pierre Robin syndrome, D. Osteogenesis imperfecta
A: Cleft lip and palate
Answer: A: Cleft lip and palate 
Explanation: None