Prelude in C-sharp minor op Prelude in F-sharp minor, op Prelude in c sharp minor op.45 Prelude in C-sharp minor Prelude in F-sharp minor Prelude in C sharp minor op.45 Prelude in B-flat minor op Prelude in C-sharp Minor Prelude in C-sharp minor op. 3-2 Prelude in C sharp minor, op.45