The best method to improve the genetic quality of mankind is

Through amniocentesis,foetal cells can be cultured and tested for detecting various diseases of the foetus by:

In the context of amniocentesis,which of the following statements is incorrect?

Given below are four methods $(A-D)$ and their modes of action $(i-iv)$ in achieving contraception. Select their correct matching from the four options that follow.

Method	Mode of Action
$(A)$ The pill	$(i)$ Prevents sperms reaching cervix
$(B)$ Condom	$(ii)$ Prevents implantation
$(C)$ Vasectomy	$(iii)$ Prevents ovulation
$(D)$ Copper $T$	$(iv)$ Semen contains no sperms

$A$: Use of condoms is a safeguard against $AIDS$ and sexually transmitted diseases besides checking pregnancy.
$R$: Certain contraceptives are implanted under the skin of the upper arm to prevent pregnancy.

Read the statements $A$ and $B$ and identify the correct choice from those given.
Statement $A$: Women are at the peak of conception on the $14^{\text{th}}$ day of the menstrual cycle.
Statement $B$: Vasectomy is the method normally employed to avoid conception in females.