Antimalarial drug used for causal prophylaxis act at which stage of developmental cycle

Ans. C. Pre-erythrocytic schizogonyPre-erythrocytic schizogony* Occurs inside the parenchymal cells of liver.* Merozoites are liberated into blood.* Drugs acting on this stage will prevent infection of RBC and clinical attack of malaria causal prophylaxis.* Drugs are* Proguanil & Tetracycline - for falciparum.