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Assertion : From day 10 to 17 of the men...

Assertion : From day 10 to 17 of the mentrual cycle is called fertile period.
Reason : As chances of fertilisation are very high during this period.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Periodic abstinence is a method in which the couples avoid or absain from coitus from day 10 and 17 of the menstrual cycle when ovulation could be expected.
As chances of fertilization are very high during this period, it is called fertile periof `(10^(th17^(th)day).
Therefore by absaining from coitus during this peoid, conception could be prevented.
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A: Periodic abstinence is one such natural method of contraception in which the couples avoid or abstain from coitus from day 10 to 17 of the menstrual cycle, when ovulation could be expected. R: Day 10 to day 17 of menstrual cycle is considered as safe period.

Assertion : Fertilisation which takes place inside the female body is called internal fertilisation. Reason: Internal fertilisation is very common in aquatic animals such as starfish.

Fill up the blanks in the following paragraph by selecting the correct option A. overset("i")("___") methods work on the principle of avoiding chances of ovum and sperms meeting B. overset("ii")("___") is one such method in which the couples avoid coitus from day 10 to 17 of the menstrual cycle C. overset("iii")("___") is another method in which the male partner withdraws his penis from the vagina just before ejaculation so as to avoid insemination D. overset("iv")("___") method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense loctation following parturition.

Assertion (A): The secretory phase in the human menstrual cycle is also called the luteal phase. Reason (R): During the luteal phase development of corpus luteum and secretion of progesterone occurs.

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