A 35 yrs old male suffering from sudden onset of high grade fever.On malarial slide examination,all stages of the parasite are seen with schizonts of 20 microns size with 14-20 merozites per cell and yellow brown pigment.The diagnosis is

• A. Plasmodium falciparum
• B. Plasmodium vivax
• C. Plasmodium malariae
• D. Plasmodium ovale