This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
Which one of these is absorbed in ileum? 
Select and explain. 
A. Vitamin D, B. B12, C. Iron, D. Fat
B: B12
Answer: B: B12 
Explanation: Vitamin B12 is predominantly absorbed in ileum Ref: guyton and hall textbook of medical physiology