When $Cl_2$ gas reacts with hot and concentrated sodium hydroxide solution,the oxidation number of chlorine changes from
- A$0$ to $+1$ and $0$ to $-5$
- B$0$ to $-1$ and $0$ to $+5$
- C$0$ to $-1$ and $0$ to $+3$
- D$0$ to $+1$ and $0$ to $-3$
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