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: Ophthalmology
Best method of detection of retained glass intraocular foreign body is: 
Select and explain. 
A. CT scan, B. Radiography, C. Ultrasonography, D. Tonography
A: CT scan
Answer: A: CT scan 
Explanation: Ans. CT scan