This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Ophthalmology
Patient with history of fall on symmetrical surface presents with enophthalmos diplopia on upward gaze and loss of sensitivity over cheek. True statement about this is : 
Select and explain. 
A. Maxillary fracture, B. It is a blow out fracture, C. Zygomatic bone is most likely injured, D. Frontal bone fracture
B: It is a blow out fracture
Answer: B: It is a blow out fracture 
Explanation: Blow out fracture - MC of orbit - Inferior wall M/C involved - Entrapment of inferior rectus in inferior wall - not able to look up Features (1) Enophthalmos (2) Diplopia(3) Infra orbital nerve anesthesia - Hanging drop or tear drop sign on imaging