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
A patient by name Mahesh whose age is 60 years presented with hypercellulor Bone marrow, Peripheral Blood smear shows pancytopenia and 15 % mycloblast cells. Most likely diagnosis is 
Select and explain. 
A. Myelodysplastic syndrome, B. Blast Crisis in CML, C. AML, D. Polycythemia vera
A: Myelodysplastic syndrome
Answer: A: Myelodysplastic syndrome 
Explanation: Hypercellulor Bone marrow
Peripheral Blood smear shows pancytopenia
15 % myeloblast cells are characteristically seen in MDS
It is common seen in elderly