$Cu$ ions released from copperreleasingintrauterine devices $(IUDs)$

  • [AIPMT 2010]
  • [AIPMT 2000]
  • A

    make uterus unsuitable for implantation

  • B

    increase phagocytosis of sperms

  • C

    suppress sperm motility

  • D

    prevent ovulation.

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