The correct answer is: A. WTT
WTT stands for “Wayside Train Timetable”. It is a document that provides information on the movements of trains on a particular railway line. The SM (Station Master) is responsible for ensuring that shunting is performed in accordance with the WTT. This means that the SM must ensure that all shunting movements are planned and executed in a safe and efficient manner.
SWR stands for “Signalling and Warning Rules”. It is a document that sets out the rules for the safe operation of railway signalling systems. The SM is responsible for ensuring that all shunting movements are carried out in accordance with the SWR. This means that the SM must ensure that all shunting movements are authorized by the signaller and that all safety precautions are taken.
G&R stands for “General and Running Rules”. It is a document that sets out the general rules for the safe operation of railways. The SM is responsible for ensuring that all shunting movements are carried out in accordance with the G&R. This means that the SM must ensure that all shunting movements are carried out in a safe and orderly manner.
None of these is the correct answer because it does not specify the document that the SM is responsible for.