In which stage of cell division are chromosomes most condensed?

Colchicine,a mitotic poison,inhibits cell division at which stage?

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.

In which phase do two discrete events,karyokinesis and cytokinesis,occur?

The separation of two chromatids of each chromosome,which is observed in anaphase,is initiated by:

Choose the correct statement regarding mitosis.