Grapevine communication is

Correct Answer: (A) Informal

Explanation of the correct option:
Grapevine communication refers to informal communication that develops naturally within an organisation. It is not officially planned or structured by management and flows through social interactions, personal relationships, and informal contacts among employees. Grapevine communication spreads information quickly and may include rumours, opinions, or unofficial messages. Since it does not follow formal channels or written rules, it is considered informal communication.

Explanation of incorrect options:
(B) Formal — This is incorrect because formal communication follows official channels and organisational hierarchy, whereas grapevine communication is unstructured and unofficial.

(C) Written — This is incorrect because grapevine communication is usually oral and informal, not written.

(D) None of these — This is incorrect because grapevine communication is clearly informal in nature.

Conclusion:
Thus, grapevine communication is an informal form of communication, making option (A) the correct answer.