Ciliates differ from all other protozoans in

Options

A. using pseudopodia for capturing prey
B. having a contractile vacuole for removing excess water
C. using flagella for locomotion
D. having two types of nuclei

Explanation

Ciliates differ from all other protozonas in having two types of nuclei.
These two nuclei are usually of different size i.e., on is meganucleus and the other is micronucleus . The former controls metabolism where the latter is concerned with reproduction , e.g. paramecium .
In other protozoans , like Amoeba single nucleus is present which is involved in metabolism and reproduction.
Other option are incorrect because Ciliates use filtre feeding mechanism for obtaining food .
Like other protozoans , they also possess contractile vacuoles.
Ciliates use cilia for locomotion .