Which of the following functions are true for | vedclass

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(C) Copper-releasing $IUDs$ (like $CuT$,$Cu7$,$Multiload$ $375$) release $Cu^{2+}$ ions.These ions perform the following functions:$1$. They suppress

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$I, II$

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(C) Copper-releasing $IUDs$ (like $CuT$,$Cu7$,$Multiload$ $375$) release $Cu^{2+}$ ions.These ions perform the following functions:$1$. They suppress the motility of sperms $(I)$.$2$. They inhibit the fertilizing capacity of sperms $(II)$.$3$. They do not affect the uterus or cervix in the way hormone-releasing $IUDs$ do (which make the uterus unsuitable for implantation and the cervix hostile to sperms).Therefore,only statements $I$ and $II$ are correct.

Which of the following functions are true for copper ions released by copper-releasing $IUDs$?
$I -$ 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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Which of the following functions are true for copper ions released by copper-releasing $IUDs$?$I -$ Suppress sperm motility$II -$ Inhibit the fertilizing capacity of sperms$III -$ Make the uterus unsuitable for implantation$IV -$ Make the cervix hostile to sperms