Vasanti, a 25-year-old-girl, presents with complaints of fever and weakness. On examination there is splenomegaly of 3 cm below the costal margin.Hb is 8 gm/dL, TLC is 3,000/mm3 , platelet count is 80,000 mm3. Which of the following is the least likely diagnosis -
Acute lymphocytic leukemia
Anemia of chronic disease
Aplastic anemia
Megaloblastic anemia