Which chord can be played on the 1st String at the 4th Fret?

The chord that can be played on the 1st string at the 4th fret is G. When you place your finger on the 4th fret of the 1st string (the high E string), you are producing a G note, which is the root note of the G major chord when played in its standard voicing.

A G major chord is typically formed using the notes G, B, and D. When you include the G note from the 1st string at the 4th fret along with the corresponding notes played on other strings (usually the 3rd fret on the 2nd string and the open 3rd string for a full open chord), you create the G major chord effectively. This understanding enriches your ability to locate and play various chords on the fretboard while recognizing the importance of root notes in chord formation.

In contrast, the other options represent different chords that involve different root notes or require different frets on the 1st string, which do not align with the G note found at the 4th fret.