Read the following and answer ' \( \mathrm{X} \) ' are most widely accepted methods of contracep...

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' \( \mathrm{X} \) ' are most widely accepted methods of contraception. These are used by females and are inserted by doctor or nurses in the uterus through vagina. However these devices are not recommended for those who eventually intend to conceive.

If ' \( \mathrm{X} \) ' is found to release \( \mathrm{Cu} \) ions in body, then how it would be helpful in preventing conception?
(A) Cu ions make uterus unsuitable for implantation
(B) Cu ions make cervix hostile to the sperms.
(C) Cu ions suppress sperms motility
(D) Cu ions inhibit ovulation
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