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
[{'content': 'Most common type of injury in the oro-facial region is: \nSelect and explain. \nA. Laceration, B. Contusion., C. Abrasion., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]