'Trachea' as respiratory organ is absent in

Insects

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Crustaceans

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Mammals

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Arachnida

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Solution

The correct option is B Crustaceans
Tracheal respiration occurs through trachea as in insects and myriapods. The system consists of a network of white shining tubes called trachea. Trachea communicates to the outside through lateral holes called spiracles or sterigmata.
So, the correct answer is option B.

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