(C) Periodic abstinence is a natural method of contraception where couples avoid coitus from day $10$ to $17$ of the menstrual cycle because ovulation

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Assertion is correct,but Reason is incorrect.

(C) Periodic abstinence is a natural method of contraception where couples avoid coitus from day $10$ to $17$ of the menstrual cycle because ovulation is expected during this time.This period is known as the 'fertile period' or 'unsafe period' because the chances of conception are very high.Therefore,the Assertion is correct,but the Reason is incorrect as it labels this period as 'safe'.

Class 12 Biology Reproductive Health Method of birth control

Medium

$A$: Periodic abstinence is a natural method of contraception in which couples avoid or abstain from coitus from day $10$ to $17$ of the menstrual cycle,when ovulation is expected.
$R$: Day $10$ to day $17$ of the menstrual cycle is considered a safe period.

A
Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
B
Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
C
Assertion is correct,but Reason is incorrect.
D
Both Assertion and Reason are incorrect.