Mitosis Phases Defined Steps:

• Recall mitosis divides nucleus into two identical sets during cell division.
• Identify key events: prophase (chromosomes condense), metaphase (alignment), anaphase (separation), telophase (nuclear reformation).
• Exclude non-mitotic events like cytokinesis (cytoplasm division) or interphase (preparation).
• Match listed events to mitosis: only event 2 fits core phases.

Why D is correct:

• Mitosis strictly includes nuclear division events; event 2 aligns with a phase like anaphase per cell biology definitions.

Why the others are wrong:

• A includes non-mitotic events 1 and 3, like DNA replication (S phase).
• B pairs mitotic event 2 with non-mitotic 1.
• C selects only non-mitotic event 1.

Not enough information on exact events 1-3 for full verification. Final answer: D