\begin{tabular}{l|l|l|l}
\hline \multicolumn{2}{c|}{ Column I } & \... VIDEO
\begin{tabular}{l|l|l|l}
\hline \multicolumn{2}{c|}{ Column I } & \multicolumn{2}{c}{ Column II } \\
\hline (A) & \( a, b, c, d \) are in AP, then & (p) & \( a+db+c \) \\
\hline (B) & \( a, b, c, d \) are in GP, then & (q) & \( a db c \) \\
\hline (C) & \( a, b, c, d \) are in HP, then & (r) & \( \frac{1}{a}+\frac{1}{d}\frac{1}{b}+\frac{1}{c} \) \\
\hline & & (s) & \( a db c \) \\
\hline
\end{tabular}
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