The correct answer is option 3- Scalar Chain.
"Gangplank" is a term associated with Scalar Chain Principle of Henry Fayol.
Scalar chain. According to Fayol, “Organisations should have a chain of authority and communication that runs from top to bottom and should be followed by managers and the subordinates.” According to Fayol, this chain should not be violated in the normal course of formal communication. However, if there is an emergency then direct contact through ‘Gang Plank’. This is a shorter route and has been provided so that communication is not delayed.
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