In earthworm, pharyngeal, nephridia are present as three paired tuffs in the segments.

3

rd,

4

th and

5

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4

th,

5

th and

6

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5

th,

6

th and

7

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6

th,

7

th and

8

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Solution

The correct option is D $4$ th, $5$ th and $6$ th
Segmentally arranged excretory organs in earthworms are called nephridia. These are of three types: septal, integumentary and pharyngeal.
Septal nephridia are present behind the 15th segment. Integumentary nephridia are present from 3rd to last segments. Pharyngeal nephridia are paired tufts present in 4th, 5th and 6th segments.
So, the correct answer is B.

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