The correct option is D During fever
Malaria is a mosquito-borne infectious disease affecting humans and other animals caused by Plasmodium species. Symptoms include fever, tiredness, vomiting, and headaches. In severe cases, it can cause yellow skin, seizures, coma, or death. A malarial parasite can be obtained from the patient during fever because fever occurs when the Plasmodium destroys the RBC.
Hence, they can be obtained from the patients during fever.