D major / b minor
has 2 sharps F# and C#
c major / a minor
no #`s or ♭`s in the key signature.
g major / e minor
has 1 sharp in the key signature. F#
a major / f# minor
has 3 sharps F#, C#, and G#.
e major / c# minor
has 4 sharps: F#, C#, G#, and D#.
b major / g# minor
has 5 sharps: F#, C#, G#, D#, and A#.
f major / d minor
has 1 flat: B♭.
b♭ major / g minor
has 2 flats: B♭ and E♭.
e♭ major / c minor
has 3 flats: B♭, E♭, and A♭.
a♭ major / f minor
has 4 flats: B♭, E♭, A♭, and D♭.
d♭ major / b♭minor
has 5 flats: B♭, E♭, A♭, D♭, and G♭.