A \( \mathrm{H}_{2} \mathrm{SO}_{4} \)
B \( \mathrm{SO}_{4}{ }^{2-} \)
C \( \mathrm{H}_{3} \mathrm{O}^{+} \)
D \( \mathrm{H}_{2} \mathrm{O} \)
Correct Answer: Option A
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