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
Blowout injury refers to what 
Select and explain. 
A. Fracture of orbit, B. Fracture of maxillary antrum, C. Fracture of temporal bone, D. Open Fracture from inside out of a long bone
A: Fracture of orbit
Answer: A: Fracture of orbit 
Explanation: The floor of orbit is its weakest wall and in blunt trauma such as a blow from a fist ,it is often fractured without fractures of the other walls.This is called blow-out fracture Bailey & Love ,26th,627.