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: Surgery
In cholangiography CBD stone appears as ? 
Select and explain. 
A. Meniscus sign, B. Cut off sign, C. Slight flow of dye from the sides of stone, D. Chain of lake appearance.
A: Meniscus sign
Answer: A: Meniscus sign 
Explanation: Ans is a ie Meniscus sign