In the context of key relationships, which pair shares the same key signature?

• A. C major and A minor
• B. F major and D minor
• C. G major and E minor
• D. A major and F# minor

Answer: (B)

Relatives keys share the same key signature: a major key and its relative minor use the same set of sharps or flats. F major has one flat (Bb), and its relative minor, D minor, uses that same flat as well, so they share the same key signature.