In the periodic-abstinence method, couples avoid coitus between which days of the menstrual cycle?
ADay 25 to Day 28
BDay 10 to Day 17
CDay 1 to Day 7
DDay 18 to Day 24
Answer & Solution
Correct answer: B. Day 10 to Day 17
Ovulation is expected mid-cycle. NCERT specifies **day 10 to day 17** as the fertile period — the window of high fertilisation chance — during which couples abstain.
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