Which of the following is true about the example transmission used in standard radio comms?

• A. TDN 3300, Lilydale to Ringwood. Stopped at platform 1, Croydon
• B. TDN 3100, Lilydale to Ringwood. Stopped at platform 1, Croydon
• C. TDN 3300, Lilydale to Ringwood. Stopped at platform 2, Croydon
• D. All of the above

Answer: (A)

In standard radio communications, a clear transmission shows the train’s designation, the service route, and the exact stop details. The example that matches this format uses the Train Designation Number 3300 for a Lilydale to Ringwood service, with the train stopping at Croydon on platform 1. That combination is what makes it the true statement: the TDN and the platform match the standard reference in the example.

The other versions don’t fit because one uses a different designation number (3100), which isn’t the standard example, and the other uses the same route but the stop is listed as platform 2, not platform 1. Since not all parts align with the standard example, they aren’t correct.