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: Surgery
All of the following are common causes of haematemesis except - 
Select and explain. 
A. Chronic peptic ulcer, B. Pernicious anemia, C. Esophageal varices, D. Carcinoma of stomach
B: Pernicious anemia
Answer: B: Pernicious anemia 
Explanation: None