Pheretima is a genus of earthworm and their body consists of about 100-120 small ring-like segments called or somites or metameres. All the segments are alike except for the first and last ones. Further, in a mature earthworm, there exists a band of glandular tissue known as the clitellum. This is present on segments 14 to 16 and forms a girdle around these and secrete mucous and albumen. Thus, the correct answer is option C.