TrueView in-stream ads can appear on:

  • A) YouTube Mastheads
  • B) the Google Play Store
  • C) Google search results and YouTube watch pages
  • D) YouTube watch pages

The correct answer is:

D) YouTube watch pages

Explanation: TrueView in-stream video ads can appear on YouTube watch pages and on videos on partner sites and apps in the Display Network.

Read more here: https://support.google.com/adwords/answer/2375464?hl=en