A medium of inter-departmental communication is? by Sunday | Apr 4 | Commerce WAEC | 0 comments A. intercom B. notice board C. radiophone D. circular Correct Answer: Option D – circular Users Also Read These:The critical angle for light travelling from a…The advertising medium that makes only audio impression is?The refractive index of a medium relative to air is…The refractive index of a given transparent medium…Which of the following concepts is a method of heat…