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1.

A. $S O_{2} + H_{2} O = H_{2} S O_{3}$
B. $S O_{2} + H_{2} O = H_{2} S O_{3}$
C. $S O_{2} + H_{2} O = H_{2} S O_{3}$
D. $S O_{2} + H_{2} O = H_{2} S O_{3}$

Answer: Option A

Explanation:

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