Centromere is concerned with

$A$ stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics.

Which of the following reforms the nucleolus during telophase?

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

In which phase of mitosis do chromosomes show the most condensed state?

Which of the following events is associated with the formation of the nuclear envelope during the $M$ phase of the cell cycle?