If you play the 11th fret on the 1st string, what standard chord can you form?

Playing the 11th fret on the 1st string (the high E string) corresponds to the note 'B'. In standard tuning, if you're looking at the 1st string specifically, this note is significant.

When considering standard chords built around the note 'B' as the melody tone, you can form a D major chord. A D major chord consists of the notes D, F#, and A, where ‘B’ acts as an extension or melody note if you are playing a D chord shape that includes both the B note on the 1st string and the other chord tones on lower strings. This means that while the core of the D major chord does not include the B, adding this note creates a more complex version of the chord while retaining the foundation sound of D major, particularly in a lead or a solo context.

The other options, although potential chords, do not align with the note at the 11th fret of the 1st string in the same way D major does when considering common chord structures. Thus, the context and functionality of the D major chord in relation to the note produced at the 11th fret provides the correct answer.