Foetal sex can be determined by examining cells from the amniotic fluid by looking for

$hCG$ is secreted by . . . . . . .

Select the odd one out.

Which of the following is false for progesterone?

Match the following columns regarding human embryonic development:

Column-$I$ (Time of gestation)	Column-$II$ (Changes in embryo)
$P$. After one month	$I$. Major organ systems are formed
$Q$. End of second month	$II$. Formation of heart
$R$. End of three months	$III$. Development of limbs and digits
$S$. During fifth month	$IV$. Movement of fetus and hair on head

Find the correct statements :
$A.$ In human pregnancy,the major organ systems are formed at the end of $12$ weeks.
$B.$ In human pregnancy the major organ systems are formed at the end of $8$ weeks.
$C.$ In human pregnancy heart is formed after one month of gestation.
$D.$ In human pregnancy,limbs and digits develop by the end of second month.
$E.$ In human pregnancy the appearance of hair is usually observed in the fifth month.
Choose the correct answer from the options given below.