Which 10-CODE is used to indicate 'No traffic-security check reply'?

• A. 10-19
• B. 10-17
• C. 10-20
• D. 10-14

Answer: (A)

In radio communication, codes are picked to match specific situations so responders can convey status quickly and clearly. When a traffic-security check is performed and there’s no reply from the other unit, a code is used that explicitly means there was no traffic-security check reply. That direct signaling is why this choice fits best—the message is precise and unambiguous about the absence of a response. The other codes point to different routine statuses (like location updates or standard follow-ups) and don’t indicate a missing reply, so they don’t fit this specific scenario. Remember, these codes can vary by agency, so study the particular code sheet you’re using for practice.