A 56-year-old man was taken to the hospital with complaints of general weakness, pain and burning in the region of tongue, extremity numbness. In the past he had resection of cardiac part of ventricle. Blood test: Hb- 80 g/L; RBC-2,0 × 1012/l; colour index of blood- 1,2; leukocytes - 3,5 × 109/l. What type of anemy is it?