All are true about communicability of malaria, except -

• A. Gametocytes appear in blood 10-12 days after the appearance of asexual parasite, in falciparum infection
• B. In the early stage of infection, their density may exceed 1000 per cmm of blood
• C. The number of gametocytes in blood increases with time
• D. Gametocytes appear in blood 4-5 days after the appearance of asexual parasite, in vivax infection