Which of the following contraceptives could be effective in avoiding pregnancy if used within $72$ hours after casual unprotected intercourse?

  • A
    Progestogen - Estrogen combination
  • B
    Androgen - $FSH$ combination
  • C
    Testosterone - Relaxin combination
  • D
    Relaxin - Oxytocin combination

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$I -$ Suppress sperm motility
$II -$ Inhibit the fertilizing capacity of sperms
$III -$ Make the uterus unsuitable for implantation
$IV -$ Make the cervix hostile to sperms

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