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: Medicine
Pawn ball megakaryocytes are characteristic of - 
Select and explain. 
A. Myelodysplastic syndrome, B. idiopathic thrombocytopenic purpura, C. Thrombotic thrombocytopenic purpura, D. Chloramphenicol toxicity
A: Myelodysplastic syndrome
Answer: A: Myelodysplastic syndrome 
Explanation: None