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: Medicine
A young patient presenting with massive hematemesis was found to have splenomegaly. In this case the most likely source of bleeding is - 
Select and explain. 
A. Duodenal ulcer, B. Esophageal varices, C. Erosive mucosal disease, D. Gastric ulcer
B: Esophageal varices
Answer: B: Esophageal varices 
Explanation: None