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
Poocaval anustomoses is seen at ? 
Select and explain. 
A. Esophagus, B. Stomach, C. Duodenum, D. Jejunum
A: Esophagus
Answer: A: Esophagus 
Explanation: Ans. is 'a' i.e., Esophagus