A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when

• A

  the sporozoites released from $RBCs$ are being rapidly killed and broken down inside spleen

• B

  the trophozoites reach maximum growth and give out certain toxins

• C

  the parasite after its rapid multiplication inside $RBCs$ ruptures them, releasing the stage to enter fresh $RBCs$

• D

  the microgametocytes and megagametocytes are being destroyed by the $WBCs.$