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: Physiology
Hepcidin inhibits ? 
Select and explain. 
A. Absorption of cobalamine, B. Transfer of iron into enterocytes, C. Folic acid synthes, D. Respiratory oxidase
B: Transfer of iron into enterocytes
Answer: B: Transfer of iron into enterocytes 
Explanation: Ans. is 'b' i.e., Transfer of iron into enterocytes Hepcidin is iron metabolism regulatory hormone that inhibits iron absorption (transfer of iron into enterocytes).