Which of the following is not a stage of mitosis?

Interphase is indeed the correct choice as it is not a stage of mitosis. Mitosis is a specific form of cell division that consists of four distinct stages: prophase, metaphase, anaphase, and telophase. These stages pertain to the actual process of cell division, during which the chromosomes are segregated to form two daughter cells.

Interphase, on the other hand, is not a phase of mitosis but rather the preparatory stage that occurs before a cell enters mitosis. During interphase, the cell increases in size, synthesizes DNA, and prepares the necessary components for cell division. This phase is crucial as it sets the foundation for successful mitotic division, but it does not involve the physical division of the cell or its nucleus.

This understanding emphasizes the distinction between the stages of actual mitotic division and the preparatory phase that occurs before this process begins.