The correct option is B Pseudoplasmodium
A pseudoplasmodium, which is not typically a true plasmodium, is a multicellular uninucleate structure of the cellular slime molds composed of aggregated haploid amoebae. Haploid ameboid cells cease feeding and clump together to form a slug-like pseudoplasmodium. A stalked fruiting body is formed from this.
A plasmodium is a multinucleate, acellular and is the feeding stage of the Myxomycota.
A sporangium is a spore producing structure.
Macrocyst is formed during sexual reproduction when thousands of amoeba cells group together to form one large cell.