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
Which of the following vitamin deficiencies is most commonly seen in short bowel syndrome - 
Select and explain. 
A. Vitamin B12, B. Biotin, C. Vitamin B1, D. Vitamin K
A: Vitamin B12
Answer: A: Vitamin B12 
Explanation: None