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
On barium swallow the grade IV esophageal varices appear as - 
Select and explain. 
A. Mucosal folds above the carina, B. Mucosal folds below the carina, C. Mucosal folds at the carina, D. A thick band
B: Mucosal folds below the carina
Answer: B: Mucosal folds below the carina 
Explanation: Ans is 'b' ie Mucosal folds below the carina