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
Mucosal tranfer of iron in GIT by- 
Select and explain. 
A. Transferrin, B. Apoferritin, C. Apotransferrin, D. Ferritin
A: Transferrin
Answer: A: Transferrin 
Explanation: None