Phase of shortest duration is

Options

A. Prophase
B. Metaphase
C. Anaphase
D. S-phase

Answer

### Step-by-Step Solution:

1. **Identify the Phases of Cell Cycle**: The cell cycle consists of several phases, including Interphase (which includes G1, S, and G2 phases) and Mitosis (which includes Prophase, Metaphase, Anaphase, and Telophase).

2. **Understand the Duration of Each Phase**:
- **Prophase**: This phase lasts approximately 14% of the total cell cycle duration. During prophase, chromosomes become visible as they condense.
- **Metaphase**: This phase takes about 4% of the total cell cycle. In metaphase, chromosomes align at the cell's equatorial plane.
- **Anaphase (N-R phase)**: This phase is very brief, lasting only about 0.8% of the total cell cycle. It involves the separation of chromatids and their movement to opposite poles of the cell.
- **S Phase**: This is the synthesis phase where DNA replication occurs, and it is not the shortest phase.

3. **Determine the Shortest Phase**: Based on the durations provided, Anaphase (N-R phase) has the shortest duration at 0.8% of the total cell cycle.

4. **Conclusion**: Therefore, the phase of shortest duration in the cell cycle is Anaphase (N-R phase).

### Answer:
The phase of shortest duration is **Anaphase (N-R phase)**.

---