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Select the correct statement from the ones given below with respect to Pheretima.

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The ventral surface of the body is marked by a dark median line along the longitudinal axis of the body.

The prostomium is a lobe which serves as a covering for the mouth and is sensory in function.

The dorsal surface is distinguished by the presence of genital papillae.

S-shaped setae embedded in the epidermal pits in the middle of each and every segment.

answer is B.

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Detailed Solution

The prostomium is a lobe which serves as a covering for the mouth and as a wedge to force open cracks in the soil into which the earthworm may crawl. The prostomium is sensory in function.

Dark median line marks the dorsal surface (not ventral surface).

Genital papillae are present on the ventral surface (not dorsal).

Setae are absent in the first segment, the last segment and the clitellum.

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