This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diseases of orbit, Lids and lacrimal apparatus, Subject name: Ophthalmology
[{'content': 'Enophthalmos caused by fracture of - \nSelect and explain. \nA. Floor of orbit, B. Medial wall of orbit, C. Lateral wall of orbit, D. Roof of orbit', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is seen in Orbital blowout fractures where orbital floor is fractured. 3 factors responsible for enopthalmos : Escape of Orbital fat into maxillary sinus. Backward traction on the globe by entrapped inferior rectus muscle. Enlargement of orbital cavity from displacement of fragments. Ref: AK Khurana 6thE pg423', 'role': 'assistant'}]