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: ENT
A patient presents with enophthalmos after a trauma to face by blunt object. There is no fever or extraocutar muscle palsy. Diagnosis is - 
Select and explain. 
A. Fracture maxilla, B. Fracture zygoma, C. Blowout fracture, D. Fracture ethmoid
C: Blowout fracture
Answer: C: Blowout fracture 
Explanation: None