F# m3/C
The F# m3 chord consists of the F# (Perfect unison) and A (Minor third) notes, with C as the bass note.

How to play the F# m3/C chord
- Play C as the lowest bass note in the left hand
- Find F# (Root) on the piano keyboard
- Add A (Minor third) — 3 semitones above F#
- Press all 3 notes simultaneously to sound the F# m3/C chord