User: Identify the musical interval (e.g perfect fifth, major third) associated with the following pairs of notes: 
C-G 
G-B
E-A
C-Fsharp
Eflat-C
D-Csharp
B-F
Assistant: C-G : perfect fifth
G-B: major third
E-A: perfect fourth
C-Fsharp: augmented fourth
Eflat-C: major sixth
D-Csharp: major seventh
B-F: diminished fifth