The correct option is C Cestoda
Pseudometamerism or strobilization is seen in tapeworms where segmentation of the body takes place by the segmentation of the ectoderm. The body consists of a number of segments or proglottids which varies in different individuals of the same species. Pseudometamerism occurs in Cestoda tapeworms. Their bodies consist of many similar units known as proglottids which are essentially packages of eggs that are regularly shed into the environment to infect other organisms.