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: Pediatrics
Iron stores are best indicated by 
Select and explain. 
A. Serum ferritin, B. Serum iron, C. Serum transferrin, D. TIBC
A: Serum ferritin
Answer: A: Serum ferritin 
Explanation: Serum ferritin reflects the storage of iron which is decreased in Iron deficiency anaemia.
It is the most sensitive marker.