Which one of the following is not a wireless transmission medium between cellular radio broadcast radio mirowaves and fiber-optic cable?

Answer 1

This is amazing. "Wireless" obviously means "without wires", so cellular, broadcast,

and microwave are plainly wireless. But before jumping at an answer, I went online

and looked for a definition of "wire". Here's what I found:

1. strand of metal: metal in the form of thin flexible strands, or a single strand of it
2. metal strand carrying electric current: a strand of metal, usually copper, that is encased in plastic or another insulating material and is used to carry an electric current
3. mesh structure: a mesh made of strands of metal, or a structure made of the mesh, e.g. a fence

Do you see what I see ? Each of those definitions mentions "metal", and that means

that if the conductor is not metal, then it's 'wireless'.

You'd have to include fiber-optic cable in that category then, because the conductor

is glass.

So none of the items on your list is 'not a wireless transmission medium'.