Preparation phase of mitosis is :-

Options

A. `G_(1)-phase`
B. S-phase
C. Prophase
D. Interphase

Answer

To determine the preparation phase of mitosis, we need to analyze the cell cycle and its phases:

1. **Understand the Cell Cycle**: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). Each phase has specific functions that prepare the cell for division.

2. **Identify the Preparation Phase**:
- **G1 Phase**: This is the first gap phase where the cell grows and synthesizes proteins and mRNA necessary for DNA synthesis.
- **S Phase**: During this phase, DNA replication occurs, resulting in the duplication of chromosomes.
- **G2 Phase**: This is the second gap phase where further growth occurs, and additional proteins are synthesized in preparation for mitosis.
- **M Phase**: This is the actual mitotic phase where the cell divides.

3. **Focus on Interphase**: Interphase includes G1, S, and G2 phases. It is the stage where the cell prepares itself for mitosis, making it a crucial part of the preparation for cell division.

4. **Conclusion**: Since interphase encompasses all the preparatory activities that occur before mitosis, the correct answer to the question is **Interphase**.

### Final Answer:
The preparation phase of mitosis is **Interphase**.