In a triangle \( A B C \)
\begin{tabular}{|c|c|c|c|c|}
\hline & \multicolumn{2}{|c|}{ Column I }....
In a triangle \( A B C \)
\begin{tabular}{|c|c|c|c|c|}
\hline & \multicolumn{2}{|c|}{ Column I } & & Column II \\
\hline (A) & \multicolumn{2}{|c|}{\( b \cos C+c \cos B \)} & (p) & \( a \) \\
\hline (B) & \multicolumn{2}{|c|}{\( b^{2}+c^{2}-2 b c \cos A \)} & (q) & \( (a+b+c) r \) \\
\hline (C) & \multicolumn{2}{|l|}{\( b c \sin A \)} & \( (\mathrm{r}) \) & \( a^{2} \) \\
\hline (D) & \multicolumn{2}{|c|}{\( b \sin A-a \sin B \)} & \( (\mathrm{~s}) \) & 0 \\
\hline & \( \mathbf{B} \) & \( \mathbf{C} \) & & \\
\hline (1) & r & q & & \\
\hline (2) & q & \( \mathrm{r} \) & & \\
\hline (3) & s & r & & \\
\hline (4) & r & \( \mathrm{r} \) & & \\
\hline
\end{tabular}
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