\[ \begin{array}{l} \mathrm{F}_{2}+\text { dil. } \mathrm{NaOH} \longrightarrow \mathrm{A}+\math...

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\[
\begin{array}{l}
\mathrm{F}_{2}+\text { dil. } \mathrm{NaOH} \longrightarrow \mathrm{A}+\mathrm{NaF}+\mathrm{H}_{2} \mathrm{O} \\
\mathrm{F}_{2}+\text { conc. } \mathrm{NaOH} \longrightarrow \mathrm{B}+\mathrm{NaF}+\mathrm{H}_{2} \mathrm{O}
\end{array}
\]
\( \mathrm{A} \) and \( \mathrm{B} \) respectively are:
(a) \( \mathrm{OF}_{2} \) and \( \mathrm{O}_{2} \)
(b) \( \mathrm{O}_{2} \) and \( \mathrm{OF}_{2} \)
(c) Both \( \mathrm{O}_{2} \)
(d) Both \( \mathrm{OF}_{2} \)
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