Assign $A, B, C, D$ from the given type of reaction.
$Fe(CN)_2 \downarrow + 4KCN \longrightarrow K_4[Fe(CN)_6]$
$Fe(CN)_2 \downarrow + 4KCN \longrightarrow K_4[Fe(CN)_6]$
- AFor precipitate formation reaction
- BFor precipitate dissolution reaction
- CFor precipitate exchange reaction
- DFor no reaction
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