What note does the 3rd fret of the 6th string represent?

The 3rd fret of the 6th string on the guitar represents a C note. To understand why, it's helpful to know the standard tuning of the guitar's 6th string, which is tuned to E.

When you play the open 6th string, it sounds an E note. As you move up the fretboard, each fret represents a half-step increase in pitch. Therefore, when you press down the 1st fret, you play an F note, the 2nd fret produces an F#, and finally, when you play the 3rd fret, you reach a G note.

Continuing from G, the notes progress as follows: the 4th fret is G#, the 5th fret is A, the 6th fret is A#, the 7th fret is B, the 8th fret is C, the 9th fret is C#, and the 10th fret is D. The pattern of half steps demonstrates how by pressing at the 3rd fret, the note is indeed C.

While other options represent different notes at other frets, the C note is specifically located at the 3rd fret of the 6th string within standard tuning.