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A) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]
B) \[{{K}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\]
C) \[CuS{{O}_{4}}.5{{H}_{2}}O\]
D) \[NaCl\]
Correct Answer: B
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