In police terminology, what does "10-90 X" represent?

The correct interpretation of "10-90 X" in police terminology refers to "Unfounded." In this context, the "10-90" code system is a standardized way of communicating specific situations or statuses over radio channels. When officers indicate an incident as "unfounded," it signifies that upon investigation or assessment, the initial report or claim was determined to be without basis or did not require any further action.

This term is particularly important in law enforcement as it helps dispatchers and officers keep accurate records of incidents and their outcomes. Understanding these codes enhances communication efficiency and supports the ability of law enforcement personnel to respond appropriately to various situations.

The other options, while relevant police jargon, pertain to different specific situations. "Gone on Arrival" indicates that respondents were not at the scene upon arrival, "Unsuccessful Home Visit" denotes a visit that didn't yield results typically due to the absence of the subject being sought, and "Unnecessary Alarm" refers to situations where an alarm was triggered without an actual emergency. Each of these codes serves a distinct purpose, illustrating the importance of precise language in policing.