A 20-year old male presents with a threeday history of an acute generalized gingivitis. He has malaise, fever and bilateral cervical lymphadenopathy. A blood examination reveals
Hb: 8.9g/100ml
Platelets: 82,000/mm3
Red blood cell count: 3,900,000/mm3
White blood cell count: 870,000/mm3
Normal Values:
Hb: 14-18g/100ml
Platelets: 150,000-400,000/mm3
Red blood cell count: 4-5million/mm3
White blood cell count: 5,000-
10,000/mm3
The most likely diagnosis is

acute myelogenous leukemia

thrombocytopenic purpura

infectious mononucleosis

acute necrotizing ulcerative gingivitis