Grapevine is which of the following type of communication?

Informal communication

The correct answer is option 2- Informal communication.

Grapevine is Informal communication.

Communication that takes place without following the formal lines of communication is said to be informal communication. Informal system of communication is generally referred to as the ‘grapevine’ because it spreads throughout the organisation with its branches going out in all directions in utter disregard to the levels of authority.