Each thoracic segment of Periplaneta ame...

Each thoracic segment of Periplaneta americana is enclosed by four `"__"` skeletal sclerites : a dorsal `"_"` a ventral `""` and two lateral `""`. The `"___"` of the prothorax is also called pronotum, which covers the neck and a part of the head
Complete the above paragraph by selecting the correct sequence of words.

Chitinous, tergum, sternum, pleura, tergum

Proteinaceous, sternum, tergum, pleura, tergum

Chitinous, sternum, tergum, pleura, sternum

Proteinaceous, tergum, pleuron, sternum, tergum

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