Which of the following is the code for returning to station?

The code for returning to station is 10-19. This code is commonly used in law enforcement communications to indicate that an officer is returning to their base or precinct after completing a task or assignment in the field. Using 10-19 helps maintain clarity and brevity in radio communications, allowing dispatchers and other officers to understand an officer's status quickly and without confusion.

The other codes listed serve different purposes in communication. For instance, 10-21 typically signifies that an officer should make a telephone call, while 10-18 is often used to indicate urgency in response to an incident. 10-12 refers to the presence of civilians and typically is a reminder that officers should exercise discretion when discussing sensitive information in their vicinity. Understanding these distinctions is essential for effective communication within law enforcement.