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B
Two
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C
Three
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D
Four
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Solution
The correct option is C Three Thorax consists of three parts prothorax, mesothorax, and metathorax. The head is connected with thorax by a short extension of the prothorax known as the neck. Each thoracic segment bears a pair of walking legs. The first pair of wings arises from mesothorax and the second pair from metathorax.