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3.Reproductive Health
medium
$A$ : Intrauterine devices $(IUDs)$ are very effective contraceptive method.
$R$ : $IUDs$ don't allow sperms to enter the uterus.
A
Assertion and Reason both are correct and also correct explanation.
B
Assertion and Reason both are correct but not explanation of assertion.
C
Assertion is correct, but Reason is incorrect.
D
Both Assertion and Reason are incorrect.
Solution
Sperms do enter the uterus, where either their motility is suppressed or quality of cervical mucus is changed.
Standard 12
Biology
