Macrocytic anemia is seen in all EXCEPT -
Robbins basic pathology 8th edition, page no 423, Answer is option3, post hemorrhagic anemia Post Hemorrhagic anemia is normocytic and normochromic. With chronic blood loss, iron stores are gradually depleted. Iron is essential for hemoglobin synthesis and effective eeythropoiesis, and it's deficiency thus leads to chronic anemia of underproduction.
Vitamin B12 deficiency
Hemolytic anemia
Post hemorrhagic anemia
Anemia of chronic disease
Haematology