Which electromagnetic radiation on the electromagnetic spectrum can be detected by the human eye?
a) radio
b) x-ray
c) microwaves
d) visible light

D. Visible Light

Explanation:

D is the right answer because visible light is perceived by humans as color and the rest aren't visible at all. For example, if you broke a bone and have to have an X-ray done, you can't see the x-rays. When you are heating something in the microwave, you can't see the waves. And when you are listening to the radio in the car, you also can't see the waves.

D visible light

Explanation: because you can detect light but you cant detect smells

the answer is b & c i believe : )