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: Anatomy
In portal hypertension the sites of portosystemic anastomosis includes - 
Select and explain. 
A. Lower end of esophagus, B. Around umbilicus, C. Lower third of rectum and anal canal, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None