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Complete the following reactions with suitable
P option-

W
\[
\begin{array}{l}
2 \mathrm{Co}\left(\mathrm{NO}_{3}\right)_{2} \stackrel{\text { Heat }}{\longrightarrow} 2 \mathrm{CoO}+\mathrm{A}+\mathrm{O}_{2} \\
\mathrm{CoO}+\mathrm{ZnO} \rightarrow \mathrm{B}
\end{array}
\]
(1) \( \mathrm{A}=\mathrm{NO}, \mathrm{B}=\mathrm{CoO} \cdot \mathrm{ZnO} \)
(2) \( \mathrm{A}=\mathrm{NO}_{2}, \mathrm{~B}=\mathrm{CoO} \cdot \mathrm{ZnO} \)
(3) \( \mathrm{A}=\mathrm{N}_{2} \mathrm{O}_{5}, \mathrm{~B}=\mathrm{Co}+\mathrm{Zn}+\mathrm{O}_{2} \)
(4) \( \mathrm{A}=\mathrm{N}_{2} \mathrm{O}_{3}, \mathrm{~B}=\mathrm{Co}^{+} \mathrm{Zn}^{+} \mathrm{O}_{2} \)
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