<prompt> Plasmodium falciparum vaccine strain:RTS, SAS01RTS, RSSpfl6NYVAC-PF01  <response>: Ans. A. RTS, SAS01Explanation Malarial vaccinesMalarial vaccine is an area of intensive research.Several vaccines are under development, effective safe vaccine is still unavailable.SpF66: 1st vaccine developed that undergone field trial. It presents a combination of antigens from the sporozoite using CS repeats and merozoite parasites.NYVAC-PF.7: It blocks transmission of the parasite from vertebrate host to mosquitoes. Highly attenuated NYVAC vaccinia virus strain has been utilized to develop a multistage vaccine.RTS, SAS01: Commercial name is mosquirix. It is most promising vaccine, engineered using genes from outer protein of P. falciparum and a portion of Hepatitis B virus, plus a chemical adjuvant to boost immune response.R-Circumsporozoite protein repeatsT-T-cell epitopes S-HBsAgS-Genetically engineered transformed yeast strain. 