Hydrogen (H), oxygen (O), and Nitrogen (N) are all examples of which of the following? Question 2 options:

all of these are correct

elements

compounds

molecules

All are correct

Explanation:

This might be a little deceptive.  The question shows H, O and N which would designate ELEMENTS.

However, all of these can also be considered compounds and molecules as well.  BUT, they are H₂, O₂ and N₂ when they are molecules and compounds.

So it depends on the whether the question is being literal or not.

a