The longest phase of mitosis is

A

Prophase

B

Metaphase

C

Anaphase

D

Telophase

The longest phase of mitosis is prophase. During prophase, which occurs after G2​interphase, the cell prepares to divide by tightly condensing its chromosomes and initiates mitotic spindle formation. The chromatin fibers condenses into discrete chromosomes. The nucleolus also disappears during early prophase.