The correct option is C Metamerism
Metamerism is the condition in which the similar body segments and organ systems are serially repeated one after another. Metamerism is present in annelids, arthropods etc. The body of Taenia is composed of series of proglottids which are self-contained units each with a complete set of reproductive organs both male and female and a part of excretory and nervous systems. These proglottids are not metameric. So, the correct answer is 'Metamerism'.