Shyamprasad is a 34 year old priest at a temple. He is a pure vegetarian and has never consumed meat , egg or fishes . He complaints of weakness, paleness, and exhaustion. On this blood report, the enterocytes are larger than normal . Which of these could be a possible causes of this ?

Options

A. Deficiency of iron
B. Deficiency of cyanacobalamin
C. Malaria
D. Sickle cell disease

Answer

B