"Workers of ABC Ltd were chit-chatting in their canteen about the behavior of their superior". This is an example of:

Option 1 -> Formal communication involves official channels and structured information flow through the organizational hierarchy, which is not the case here.

Option 2 -> Grapevine communication is informal, unofficial communication that occurs through casual conversations, gossip, and social interactions among employees, exactly as shown in this scenario.

Option 3 -> Personal barriers are individual obstacles like emotions, perceptions, or attitudes that hinder effective communication, not a type of communication itself.

Option 4 -> Organisational barriers are structural impediments like hierarchy, policies, or organizational design that obstruct communication flow, not a communication type.

Hence, Option 2: Grapevine communication -> When workers informally chit-chat in the canteen about their superior's behavior, they are engaging in unofficial, informal communication that spreads through social networks within the organization. This is the classic definition of grapevine communication - it bypasses formal channels and thrives in casual settings like canteens, lunch breaks, or social gatherings -> correct