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a
The functional body cavity is schizocoelom.
b
It is metamerically segmented organism.
c
Its exoskeleton is made of polysaccharide.
d
It has 3 pairs of legs and 2 pairs of wings.
answer is A.
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Detailed Solution
Periplaneta has true coelom termed schizocoelom (a coelom that is formed by the splitting of the mesoderm). In Periplaneta, schizocoelom is reduced to gonads. The functional body cavity (perivisceral cavity) is haemocoel.