B natural minor scale
(or Aeolian mode scale)

Listen

B minor notes: B C# D E F# G A

3-notes chords built on B minor scale:

1. B Minor: B D F#
2. C# Diminished: C# E G
3. D Major: D F# A
4. E Minor: E G B
5. F# Minor: F# A C#
6. G Major: G B D
7. A Major: A C# E

4-notes chords built on B minor scale:

1. B Minor 7: B D F# A
2. C# Half Diminished 7: C# E G B
3. D Major 7: D F# A C#
4. E Minor 7: E G B D
5. F# Minor 7: F# A C# E
6. G Major 7: G B D F#
7. A Dominant 7: A C# E G