This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
Which of the following is most likely to be used in a young child with chronic renal insufficiency? 
Select and explain. 
A. Cyanocobalamin, B. Desferrioxamine, C. Erythropoietin, D. Filgrastim (G-CSF)
C: Erythropoietin
Answer: C: Erythropoietin 
Explanation: Erythropoietin is produced by kidneys, in CRF production of erythropoietin is reduced and we need to supplement it from outside. Preprations used in CRF are Epoietin, Darbopoietin, Peginesatide. Its also used in anaemia due to myelosuppressive Drugs(zidovudine)and cancer chemotherapy. Cyanocobalamine is used in treatment of megaloblastic aneamia Desferroxamine(S.C.) is used as an antidote of acute iron poisoning Filgrastim is (G-CSF) used in neutropenia due to anticancer drugs