Which note corresponds to the 9th fret of the E string?

The note corresponding to the 9th fret of the E string is indeed C#. To understand this, it helps to know the layout of the guitar fretboard and how notes are organized.

The E string is tuned to the note E in its open position. As you move up the frets, each fret represents a half step increase in pitch. Therefore, if you start at E and move up:

• 1st fret: F

• 2nd fret: F#

• 3rd fret: G

• 4th fret: G#

• 5th fret: A

• 6th fret: A#

• 7th fret: B

• 8th fret: C

• 9th fret: C#

Thus, the 9th fret corresponds to the note C#, which is the correct answer. This systematic approach of raising the pitch by half steps as you progress up the fretboard is fundamental to navigating and understanding the guitar.