This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Bone Marrow Showing Positive Staining With Periodic Acid Schiff .Likely Diagnosis is 
Select and explain. 
A. AML-M2, B. AML-M3, C. AML-M6, D. ACUTE LYMPHOBLASTIC LEUKEMIA
C: AML-M6
Answer: C: AML-M6 
Explanation: AML M6 (Acute erythroid leukaemia) characterized by a marked increase of erythroid precursors in bone marrow