In which of the following is the wings vestigial?

  • A
    Female $Blatta \text{ } orientalis$
  • B
    Male $Blatta \text{ } orientalis$
  • C
    Male $Periplaneta \text{ } americana$
  • D
    Female $Periplaneta \text{ } americana$

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Which of the following is a correct description regarding the animal?

Answer in one word or one line.
Give the common name of $Periplaneta \text{ } americana$.

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Sexual dimorphism is observed in .....

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