Find the non-harmonic tone

Over a chord, identify which melody note does not belong to it.

1. Step 1First the C major chord (C-E-G) sounds as context.
2. Step 2Then three melody notes play: two belong to the chord and one does not (a non-harmonic tone, like a passing or neighbour note).
3. Step 3Pick the note that does not belong to the chord and confirm.