A 45-year-old man with a history of chronic liver disease due to alcohol use presents with complaints of fatigue and pallor. His physical examination reveals icteric sclera, hepatomegaly, and mild splenomegaly. Laboratory findings show macrocytic anemia, elevated bilirubin, and increased mean corpuscular volume (MCV). A peripheral blood smear is performed and shows red cells whose area of central pallor is elongated in a mouth-like shape. Question: Which of the following morphologic findings in red cells is most likely seen in this patient?
