The non-dividing cells like RBC & muscle cells are in

Options

A. `G_(1)` -phase
B. `G_(0)` -phase
C. `G_(2)` -phase
D. S-phase

Answer

To solve the question regarding the phase in which non-dividing cells like red blood cells (RBCs) and muscle cells are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Cell Cycle Phases**: The cell cycle consists of several phases, including G1, S, G2, and M phases. Additionally, there is a phase known as G0.

2. **Identify the G0 Phase**: The G0 phase is often referred to as the resting phase. Cells in this phase are not actively dividing and are in a quiescent state.

3. **Recognize Non-Dividing Cells**: Non-dividing cells, such as red blood cells (RBCs) and muscle cells, do not undergo mitosis. They are specialized cells that have exited the cell cycle.

4. **Determine the Correct Answer**: Since RBCs and muscle cells are non-dividing, they are classified as being in the G0 phase of the cell cycle.

5. **Conclusion**: Therefore, the answer to the question is B - G0 phase.

### Final Answer:
The non-dividing cells like RBC and muscle cells are in **B - G0 phase**.

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