Which of the following mollusc is formed by a larva which have torsion?

Lamelledens

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Pila

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Sepia

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Octopus

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Solution

The correct option is B Pila
Torsion is the rotation of the visceral mass and foot 180 degrees with respect to the head and foot and is a unique characteristic of modern gastropods.Torsion occurs during development in all gastropods, usually in the late veliger stage. It occurs in Pila. Hence, option B is correct.

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