The cells that do not divide further, exit `G_(1)` phase to enter an inactive stage called__ of the cell cycle.

Options

A. M stage
B. `G_(2)` stage
C. S stage
D. `G_(0)` stage

Explanation

To answer the question, "The cells that do not divide further, exit G1 phase to enter an inactive stage called__ of the cell cycle," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Cell Cycle**: The cell cycle consists of several phases that a cell goes through during its life. It includes the M phase (mitotic phase), G1 phase (first gap), S phase (synthesis), and G2 phase (second gap).

2. **Identifying the G1 Phase**: The G1 phase is the first stage after a cell divides. During this phase, the cell grows and prepares for DNA synthesis. It is a crucial phase for cell growth and metabolism.

3. **Recognizing the S Phase**: After the G1 phase, the cell enters the S phase, where DNA replication occurs. This is essential for cell division.

4. **Moving to G2 Phase**: Following the S phase, the cell enters the G2 phase, where it continues to grow and prepares for mitosis.

5. **Understanding the G0 Phase**: Sometimes, a cell may decide not to divide. If it exits the G1 phase and enters a state of inactivity, this phase is known as the G0 phase. In this phase, the cell is quiescent and does not actively participate in the cell cycle.

6. **Conclusion**: Therefore, the correct answer to the question is that the inactive stage of the cell cycle that cells enter after exiting the G1 phase is called the **G0 stage**.

### Final Answer:
The cells that do not divide further, exit G1 phase to enter an inactive stage called **G0 stage** of the cell cycle.