Which one of the following statements about sex hormones is correct?

  • A
    $Testosterone$ is produced by $Leydig$ cells under the influence of $Luteinizing$ $Hormone$ $(LH)$.
  • B
    $Progesterone$ is secreted by the $corpus$ $luteum$ and softens ligaments during childbirth.
  • C
    $Estrogen$ is secreted by both $Sertoli$ cells and $corpus$ $luteum$.
  • D
    The $progesterone$ produced by the $corpus$ $luteum$ is biologically different from the one produced by the $placenta$.

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