Which of the following is $NOT$ a secondary sexual characteristic in females?

$A$ single ejaculation contains $...A...$ to $...B...$ million spermatozoa. Semen has a pH of $...C...$ to $...D...$. Its alkalinity helps to neutralize the acidity of the urethra. Here $A, B, C$ and $D$ refer to:

Ejaculation of semen:

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?

Identify the $CORRECT$ match from the Columns $I$,$II$ and $III$.

$I$	$II$	$III$
$1$. Interstitial cells	$a$. Cortex of ovary	$i$. Follicular fluid
$2$. Sertoli cells	$b$. Ovarian follicle	$ii$. Progesterone
$3$. Granulosa cells	$c$. Testis	$iii$. Attachment of sperm bundle
$4$. Cells of corpus luteum	$d$. Seminiferous tubules	$iv$. Testosterone

In mammals,the egg is microlecithal and alecithal because they are.....