Assign $A, B, C, D$ from the given type of reaction.
$NiCl_2 + 2dmg \xrightarrow{NH_4OH} Ni(dmg)_2 \downarrow$
$NiCl_2 + 2dmg \xrightarrow{NH_4OH} Ni(dmg)_2 \downarrow$
- AFor precipitate formation reaction
- BFor precipitate dissolution reaction
- CFor precipitate exchange reaction
- DFor no reaction
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