Which of the following endoparasites of humans show viviparity?

Ascaris lumbricoides

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Ancylostoma duodenale

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Enterobius vermicularis

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Trichinella spiralis

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Solution

The correct option is D Trichinella spiralis
Viviparity refers to the development of the embryo inside the body of the parent, eventually leading to live birth, as opposed to reproduction by laying eggs that complete their incubation outside the parental body.
Hence, in the given options, Trichinella spiralis shows viviparity.

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