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
X-Ray appearance of CBD stone on cholangiography is: 
Select and explain. 
A. Meniscus appearance, B. Sudden cut off, C. Smooth tapering, D. Eccentric occlusion
A: Meniscus appearance
Answer: A: Meniscus appearance 
Explanation: A i.e. Meniscus appearance