Answer: False
Explanation: Grapevine is an informal communication channel in the organisation in which the information flows in all directions irrespective of the level of authority.
This is not considered to be a reliable channel as it does not make any authority or obligation to anyone and often leads to false rumors in the organisation. Whereas in the case of formal communiques one can make the authority of the sender of the message if the information lead to any false rumors and chaos.
Thus, the given statement is false.
