C minor
The relative major to C minor is E-flat major.
The relative major key of C minor is E flat major.
The relative major of the key of C minor is E flat major.
E flat
The relative minor of E major is C# minor.
Start in C major, parallel minor is C minor, relative major is E-flat major, parallel minor is E-flat minor, enharmonic respelling is D-sharp minor (which has 6 sharps).
There are two flats, B flat and E flat. It is the relative minor for B flat Major.
F# minor is relative to A major, so Gb minor is essentially the same, although they're probably looking for B double flat major or something useless like that.
The key signature is E flat major, which is also, C minor, the relative minor of E flat major. You can find out what flat key signature you're in by finding the second to last flat (in this case E flat). It is the major version of that key signature!
The relative major key of E minor is G major.
The relative major key to E minor is G major.
E Minor is the relative minor to G Major.