This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
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: Esophageal varices presents as serpiginous filling defects (arrows) in the esophagus below the level of carina Radiological Grading of varices Grade I- Straight varices seen only on inspiration Grade II- Straight varices seen in all phases of respiration Grade III- Touous varices in lower half of esophagus Grade IV- Touous varices in entire esophagus Ref: surgical disease in tropical countries Pgno : 130