A) \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}\], \[{{H}_{2}}S{{O}_{4}}\]
B) \[KMn{{O}_{4}}\], \[{{H}_{2}}S{{O}_{4}}\]
C) \[N{{a}_{2}}Cr{{O}_{4}}\], HCl
D) \[{{K}_{2}}Mn{{O}_{4}}\], \[{{H}_{2}}S{{O}_{4}}\]
Correct Answer: A
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