What is the ploidy level of the cells in an angiosperm plant body?

Match the following columns regarding the chromosome number in meiocytes $(2n)$ of different organisms:
| Column-$I$ (Organism) | Column-$II$ (Chromosome number in meiocyte) |
| :--- | :--- |
| $p$. Ophioglossum | $v$. $20$ |
| $q$. Apple | $w$. $34$ |
| $r$. Rice | $x$. $24$ |
| $s$. Maize | $y$. $42$ |
| | $z$. $1260$ |

$A$ plant with both male and female flowers borne on it is called:

How many of the following statements are true about angiosperms?
$A$. The generative cell floats in the cytoplasm of the vegetative cell.
$B$. The stalk of the ovule is called the funiculus.
$C$. Pollen grains are shed at the two-celled stage.
$D$. The embryo sac is diploid.
$E$. The megaspore mother cell towards the chalazal end becomes functional.

Pollen tablets are available in the market for

Provide information about pre-fertilization structures and events in flowering plants.