This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Evaluation and Management of Portal Hypertension, Subject name: Surgery
The below instrument is used for the treatment of: 
Select and explain. 
A. Retention of urine, B. Hemorrhoids, C. Achalasia cardia, D. Variceal bleeding
D: Variceal bleeding
Answer: D: Variceal bleeding 
Explanation: Ans. (d) Variceal bleeding.