The media used for inter-department communication includes

Explanation

Option A states that circulars, notice boards, and departments are used for inter-department communication. Circulars are documents that are sent to a large number of people, notice boards are physical boards where information is posted, and departments are the different areas or divisions within an organization. While circulars and notice boards can be used for communication, departments themselves are not considered a form of media for communication. Therefore, Option A is not correct.

Option B suggests that memoranda, advertising, and face-to-face communication are used for inter-department communication. Memoranda are written messages sent within an organization, advertising is a form of communication aimed at promoting a product or service, and face-to-face communication involves talking directly with someone. While these forms of communication can be used in general, they may not be specifically used for inter-department communication. Therefore, Option B is not correct.

Option C states that memoranda, advertising, and telephone are used for inter-department communication. We already know that memoranda are written messages, and advertising is a way of promoting something. The telephone is a device that allows people to talk to each other over long distances. All of these forms of communication can be used for inter-department communication, so Option C is a possible correct answer.

Option D suggests that memoranda, circulars, and telephone are used for inter-department communication. We know that memoranda and telephone can be used for inter-department communication, but circulars are documents sent to a large number of people and may not be specifically used for inter-department communication. Therefore, Option D is not correct.

Based on the options given, Option C (memoranda, advertising, and telephone) is the most correct answer as these forms of communication can be used for inter-department communication.