In Pheretima, nephridia occurs in

Options

A. All segment except 1 – 4 and 10 – 14
B. 1 – 2, 4 – 6, 15 to last segments
C. Meganephridia in pre-clitellar and micronephridia in post-clitellar segments
D. Micronephridia in all segments meganephridia from clitellar region to end

Answer

D

Explanation

Nephridia are absent in the first three segment and the last segment. Septal nephridia are called meganephridia from clitellar region to end and pharyngeal and integumentary nephridia in all segments.