Hand shunting outside section in gradient ________ is prohibited except with DRM permission. A. ST 1-600 B. ST 1-700 C. ST 1-800 D. None of these

The correct answer is: D. None of these

Hand shunting outside section in gradient is prohibited except with DRM permission. This means that it is not allowed to move a train by hand on a slope without permission from the DRM (Directorate General of Railways). This is because it is a dangerous activity that could lead to accidents.

The options A, B, and C are all incorrect because they do not refer to the gradient of the track. The gradient of a track is the measure of its slope. A track with a high gradient is one that is very steep, while a track with a low gradient is one that is very flat.

It is important to follow the rules about hand shunting outside section in gradient to ensure the safety of everyone involved.