Which of the following statements is incorrect regarding the anatomy of an earthworm?

  • A
    Ovaries mature first in earthworms.
  • B
    Spermathecae are present in segments $6-9$.
  • C
    Male genital apertures are located on the $18^{th}$ segment.
  • D
    One pair of ovaries is present in the $13^{th}$ segment.

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