This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Malabsorbtion Syndrome, Subject name: Medicine
In celiac sprue which vitamin deficiency is least likely ? 
Select and explain. 
A. Vitamin A, B. Vitamin B12, C. Folic acid, D. Iron
B: Vitamin B12
Answer: B: Vitamin B12 
Explanation: Celiac disease - The proximal pa of the gut > distal pa. Hence vitamin B12 levels are rarely ever low. Due to maximum damage to duodenum and jejunum iron and folic acid deficiency is common Vitamin A deficiency can develop in celiac disease on account of steatorrhea.