In which minor key are there 5 sharps?

The correct choice, G# minor, features 5 sharps in its key signature. This is determined by the arrangement of sharps in the order they appear: F#, C#, G#, D#, and A#.

In music theory, each minor key has a corresponding major key that is a minor third above it. G# minor is the relative minor of B major. When you look at the key signature of B major, it is known for having 5 sharps, which translates directly to G# minor's key signature as well. Each sharp corresponds to a note alteration that is necessary to maintain the correct phonetic and harmonic structure of the scale, ensuring that the needed semitones are present within that minor framework.

For the other choices: C minor has 3 flats, D minor has 1 flat, and A minor has no sharps or flats in its natural form, confirming that their key signatures do not match the requirement of having 5 sharps. Thus, G# minor stands out as the only option with the specified characteristics.