Which of the following is a free living flatworm?

Planaria

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Taenia

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Fasciola

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Pheretima

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Solution

The correct option is A Planaria
Taenia and Fasciola are parasitic platyhelminthes.
Pheretima is an annelid animal.
Planaria is a nonparasitic or free-living platyhelminth.
Planaria (Dugesia) belong to class Turbellaria of phylum Platyhelminthes.
Mostly free-living flatworms are placed in class Turbellaria.

So, the correct answer is 'Planaria'.

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