The structure that ruptures for dehiscence in moss capsule is

Operculum

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Annulus

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Peristome

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Calyptra

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Solution

The correct option is B Annulus
Operculum/lid is connected to the theca region by annulus. Internally the two are separated by peristome. Annulus dries and separates like a circular band holding the operculum and theca
So, the correct answer is 'Annulus'

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