C♯ Major,
F♯ Major,
B Major,
E Major,
A Major and D Major.
The key that includes both F sharp and C sharp is the key of D major.
C# Major
A major has three sharps: F, C, and G.F sharp, C sharp, G sharp
In the key of D major, the notes that are sharp are F, C, and G.
In the key of E major, the notes that are sharp are F, C, G, D, and A.
Four key signatures have G sharp and E sharp in them: F sharp Major, D sharp minor, C sharp Major and A sharp minor.
The key with three sharps is A major, however A major uses C sharp - alongside with G sharp and F sharp - instead of D sharp.
C# major A# minor
B Major is the 1st major scale that CONTAINS A sharp and F sharp within its key signature but has a total of 5 sharps which are, F# C# G# D# A# F# Major also CONTAINS A sharp and F sharp within its key signature but has a total of 6 sharps which are, F# C# G# D# A# E# C# Major also CONTAINS A sharp and F sharp within its key signature but has a total of 7 sharps which are, F# C# G# D# A# E# B#
No key signatures contain only those three sharps. With the A-sharp, it could be the keys of B major, F-sharp major, or C-sharp major (or any of their relative minor keys).
C sharp major, or A sharp minor. The sharps are F, C, G, D, A, E and B.C# Major does
A Major, although the theme is ambiguous with the C sharp and C natural. The key of the piece still remains A major.