Which does NOT occur in telophase? Cytokinesis is under way. The nuclear envelope is being reconstructed. The centromeres split apart. Chromosomes de-condense into chromatin. The nucleolus reforms.

The centromeres split apart

Explanation:

Telophase is the last sage of cell cycle that ultimately result in the formation of daughter cells. The chromosome become more condense in this stage.

The nuclear envelope reconstructed and the cyotkinesis is under way in the telophase. The nucleolus reforms in the telophase. The centromeres are split part in the anaphase stage of the cell cycle.

Thus, the correct answer is option (3).