A 35-year-old man complains of rapidly increasing fatigue, palpitations,“visual snow”, dizziness. He has a history of peptic ulcer of the stomach, Objectively the skin is pale. Vesicular respiration is observed in the lungs. Systolic murmur is detected over the cardiac apex, heart rate is 100/min., BP is 100/70 mmHg. The epigastrium is slightly tender on palpation. Blood test: erythrocytes — 3.2• 1012/L, Hb — 100 g/L, color index — 0.94. What type of anemia is it?