Final answer:
The statement that a trackman on duty is least likely to discover a fire is likely false. Trackmen are responsible for monitoring the railway's safety and conditions, making them likely to spot fires on or near the tracks.
Step-by-step explanation:
The statement in question suggests that a trackman on duty is unlikely to discover a fire. However, without additional context or specific situations, this statement is dubious. In many scenarios, a trackman (a railway employee responsible for inspecting and maintaining the tracks) would indeed be likely to spot a fire, especially if it's near or on the train tracks since they are actively monitoring the railway's safety and conditions.
Therefore, the correct answer to the student's question is: 2) False. Trackmen are often tasked with staying vigilant for any signs of danger, including fires, to ensure the safety of rail operations.