In cobalt nitrate charcoal cavity test, which of the following matc...

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In cobalt nitrate charcoal cavity test, which of the following match is correct
P
W
\begin{tabular}{|l|l|l|l|}
\hline \multicolumn{2}{|c|}{ Column A } & \multicolumn{2}{c|}{ Column B } \\
\hline (1) & \( \mathrm{Zn}^{2+} \) & (A) & Bluish white \\
\hline (2) & \( \mathrm{Al}^{3+} \) & (B) & Green \\
\hline (3) & \( \mathrm{Mg}^{2+} \) & (C) & Pink \\
\hline (4) & \( \mathrm{Sn}^{2+} \) & (D) & Blue \\
\hline
\end{tabular}
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