Which of the following are unpaired structures in the cockroach?(a) Mandible(b) Maxilla(c) Hypopharynx(d) Labrum(e) Antenna

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(a) and (b)

(a), (d) and (e)

(b), (c) and (d)

answer is B.

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Detailed Solution

Labrum, labium and hypopharynx are unpaired. Mandibles, maxillae and antennae are paired.

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