The correct option is B Trypanosoma
Trypanosoma is flagellated protozoan. The members of this group are either free-living or parasitic.
Paramecium and Acineta are ciliated protozoans. These are aquatic, actively moving organisms because of the presence of thousands of cilia.
Amoeba is amoeboid protozoans. They move and capture their prey by putting out pseudopodia (false feet).