Select the correct option with respect to cockroaches.

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Malpighian tubules convert nitrogenous wastes into urea.

Males bear short anal styles not present in females .

Nervous system comprises of a dorsal nerve cord and ten pairs of ganglia.

The fore wings are tegmina which are used in flight.

answer is B.

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Detailed Solution

Male cockroaches bear a pair of short, thread like anal styles which are absent in females.Malpighian tubules absorb nitrogenous waste products and convert them into uric acid.The nervous system of cockroach consists of a series of fused, segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side. Three ganglia lie in the thorax, and six in the abdomen.Forewings (mesothoracic) called tegmina are opaque dark and leathery and cover the hind wings when at rest. They do not help in flight.

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