C-Minor

C minor is a minor scale based on C, consisting of the pitches C, D, E♭, F, G, A♭, and B♭. Its key signature consists of three flats. Its relative major is E♭ major and its parallel major is C major.
Relative key: E♭ major
Parallel key: C major
Dominant key: G minor
Subdominant: F minor

https://en.wikipedia.org/wiki/C_minor