It depends on what the chord progression is. Just about any chord will work depending on what the melody sounds like or what chord progression is.

A chord progression is a chordal sequence that makes up a coherent harmony.

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how do i add melody to a chord preogression

Firstly, there is no B minor chord in the key of F sharp minor. Rather, it is A sharp minor chord.

And you can use any chord at the end of a chord progression. Why not!

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