CORRECT answer is informal inter-communication.Informal Communication/Grapevine communicationGrapevine is the channel of informal communication that establishes communication with partners and subordinates.It ignores the formal channel of communication and spreads rumors and gossips at all levels.This channel of communication is not MOTIVATED by the organization.It is neither pre-planned nor recorded.It is not set with the lines of organizational hierarchy.It moves in any direction like a grapevine. Characteristics of Grapevine CommunicationIt is a very flexible channel of communication..It is not governed by any organization.It spreads information rapidly from top to bottom of the organization.It is used for the self-interest of the employees.It is an inexpensive method of communication.Types of Grapevine CommunicationSingle ChainIt deals with the transmission of information through a single chain of networks.For example, an employee gets an additional bonus, then this information will pass through a single chain.Gossip ChainIt deals with the transfer of information among groups of PEOPLE sharing mutual interests.It is slow in transmitting the information.For example, a boss suspended an employee.Probability ChainIn this chain, each of the individuals randomly passes the same information to others.Cluster ChainIn this chain, someone tells the message to the set of individuals, then this set of individuals tells the same message to another set of individuals.Pros and Cons of Grapevine Communication ProsThe message PASSED through the grapevine has FAST speed as compared to any other channel.It is the non-expensive and most rapid oral method of communication.It is not restricted to any line of hierarchy.It serves the mutual interest of the people.It helps to raise the morale of employees.It helps in taking effective decision making.ConsIt often carries incomplete information leading to misunderstanding.The faulty message can affect the goodwill of the organization.It can reduce the employee's productivity.The sender doesn't take responsibility for the message.