Answer:
The correct answer would be anaphase.
The anaphase is the stage of the mitosis during which disjunction takes place, that is, the sister chromatids of each chromosome are separated and pulled towards opposite poles.
During this phase, the spindle fibers get shorten and pull the attached chromatids towards the pole.
Consequently, the cell also gets elongated.
Each sister chromatid is now considered as a separate chromosome. In addition, each chromosome acquires a distinct V shape during this phase.