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: Radiology
Tear drop sign" is seen on Waters view in: 
Select and explain. 
A. Blow out fracture, B. Maxillary mucocele, C. Nasolacrimal duct blockage, D. Fibrous dysplasia
A: Blow out fracture
Answer: A: Blow out fracture 
Explanation: Ans. Blow out fracture