Oral contraceptives inhibit $A$ and implantation as well as the quality of cervical $B$ to prevent the entry of sperms. Choose the correct option for $A$ and $B$ to complete the given statement.

  • A
    $A-$ovulation; $B-$mucus
  • B
    $A-$oogenesis; $B-$structure
  • C
    $A-$oogenesis; $B-$nucleus
  • D
    $A-$spermatogenesis; $B-$mucus

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