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: Pathology
Oral ulceration resembling apthae are encountered in 
Select and explain. 
A. Gluten enteropathy, B. Chronic smokers, C. Excess of B-complex, D. Anti-malarial medication
A: Gluten enteropathy
Answer: A: Gluten enteropathy 
Explanation: None