The condensation of chromosomes and the appearance of asters occur during the ...... phase.

Choose the correct combination of options to select the correct statement for prophase:
$I.$ Chromosomal material condenses to form compact mitotic chromosomes.
$II.$ The assembly of mitotic spindle is initiated by the microtubules.
$III.$ Cells do not show organelles when viewed under the prophase.
$IV.$ The nucleolus or nucleoli degenerate completely.

Statement $P$ : Small disc-shaped structures called kinetochores are present on the surface of the centromeres.
Statement $Q$ : Spindle fibers attach to the centromeres of the chromosomes.

During mitosis,the $ER$ and nucleolus begin to disappear during . . . . . . .

What do $A$ and $B$ represent in the given figure?

In which phase of mitosis are the chromosomes arranged around the equator of the spindle?