This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Pancytopenia with cellular marrow is seen in all except 
Select and explain. 
A. Megaloblastic anemia, B. Myelodysplasia, C. Paroxysmal nocturnal hemoglobinuria, D. G6PD deficiency
D: G6PD deficiency
Answer: D: G6PD deficiency 
Explanation: Pancytopenia with cellular marrow is seen in

Megaloblastic anemia
Myelodysplasia
Paroxysmal nocturnal hemoglobinuria