This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
Best test for assessment of iron status is: 
Select and explain. 
A. Transferrin, B. Ferritin, C. Serum iron, D. Hemoglobin
B: Ferritin
Answer: B: Ferritin 
Explanation: b. Ferritin(Ref: Nelson's 20/e p 2323-2325, Ghai 8/e p 334-335)Serum ferritin level indicates the amount of iron present in both liver and reticuloendothelial system and hence is the best assessment of iron status.