A 40 year old man has megaloblastic anemia and early signs of neurological abnormality. The drug most probably required is :: (A) Folic acid, (B) Iron sulphate, (C) Erythropoietin, (D) Vitamin B12
Answer is D. Deficiency of vitamin B12 results in megaloblastic anemia and demyelination. It can cause subacute combined degeneration of spinal cord and peripheral neuritis.