A 14 year old boy complains with gingival bleeding oral ulcers, anaemia with hepatomegaly but no lymphadenopathy, total eukocyte count of one-lakh cells per mm3 is suffering from________________?

A. Acute myeloid leukemia
B. Chronic monocytic leukemia
C. Chronic lymphoblastic leukemia
D. Chronic myeloid leukemia