Answer :
In OATH lifeline communication system A stand for Advance (give slack in rope). Option D is the correct answer.
The OATH lifeline communications system is a method of communication used by the firefighters and other emergency personnel to communicate in close proximity. The system uses a series of tugs on a rope to represent the different messages. The letters A, O, T, H stand for the following messages:
A - Advance (give slack in rope)
O - OK
T - Take up slack (tighten rope)
H - Help
So the answer is d. Advance (give slack in rope). Option D is the correct answer.
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