Which of the following is not a graphic aid?
AEpidiascope
BChart
CMap
DGraph
Answer:
A. Epidiascope
Read Explanation:
An epidiascope is an optical device used in the late 19th and early 20th centuries, primarily for projecting images, such as photographs or drawings, onto a screen.
It could project both opaque materials (like photographs or documents) and transparent materials (like slides).
It was an important predecessor to modern projectors and was commonly used in educational and entertainment settings.