Question

When should a hyphen be used for X-ray?

1) When it is a verb
2) When it is an adjective
3) Both as a verb and an adjective
4) Never

Answer 1

The hyphen should be used for 'X-ray' when it is used as a modifier before a noun. Therefore, the correct answer is when 'X-ray' is an adjective.

Step-by-step explanation:

The hyphen should be used for 'X-ray' when it is used as a modifier before a noun. In this case, 'X-ray' is an adjective because it describes the noun that follows. For example, we would write 'X-ray machine' to describe a machine used for taking X-ray images. Therefore, the correct answer is option 2: when 'X-ray' is an adjective.