Consider a nxn symmetric matrix: \(\begin{array}{c} &\begin{array}{c c c c c c c c c} \underleftrightarrow{\quad \quad n b w\quad \quad} & & & & & & & &\\\end{array} \\&\left[\begin{array}{c c c c c c c c c}x & x & x & x \\& x & x & x & x \\& & x & x & x & x \\& & & x & x & x & x \\& & & & x & x & x & x \\& & & & & x & x & x & x \\\end{array}\right]\end{array}\) here nbw is called as ______

• A. Full band width
• B. Half band width
• C. Semi band width
• D. Co band width