Passenger warning board is placed at a distance of ________ meters from the first stop signal. A. 1200 B. 1000 C. 1500 D. 1800

The correct answer is: A. 1200 meters.

A passenger warning board is a sign that is placed at a distance of 1200 meters from the first stop signal. It is used to warn passengers that the train is approaching and that they should prepare to stop. The board is typically red and white, and it has the words “STOP” and “TRAIN” written on it.

The other options are incorrect because they are not the correct distance from the first stop signal. Option B is 1000 meters, option C is 1500 meters, and option D is 1800 meters. These distances are not standard distances for passenger warning boards.

I hope this helps!