Synchronization

Step 1: Understanding the sections.
- **Critical section** (C): This is the section where the process accesses shared resources.
- **Entry section** (A): This is the section before the critical section, where the process requests entry.
- **Remainder section** (B): The section after the critical section, where the process releases the resource and performs other tasks.
- **Exit section** (D): This section handles the exit process from the critical section.

Step 2: Arrange the sections correctly.
To form a valid structure for a process in the critical section:

- The process first enters the **Entry section** (A), checks for any conditions (if needed), and then moves to the **Critical section** (C).

- After completing its task in the **Critical section**, the process moves to the **Exit section** (D) to release the resource.

- Finally, the process moves to the **Remainder section** (B) for other tasks.

Step 3: Conclusion.
The correct order of statements is **(C), (B), (A), (D)**.