The correct option is A Protista
Correct option: (b) Protista
∙ Amoeba belongs to the kingdom Protista, phylum Protozoa, and class Sarcodina which uses pseudopodia for locomotion.
∙ Protista includes unicellular and eukaryotes.
∙ Amoeba is a single celled-organism having a well-defined nucleus with a nuclear membrane (eukaryotes).