Examine the figure given below and select the right option giving all the four parts $a, b, c$ and $d$. Correctly identify
$a\quad\;b\quad\;c\quad\;d$

$X$ – $MMC$ is a large cell containing dense cytoplasm and a prominent nucleus

$Y$ – Method of embryo sac formation from a single megaspore is termed monosporic

Pollen tube at the time of entering embryo sac has

Embryo sac is also known as

Location and Function :

$1.$ Ovary

$2.$  Placenta