A 3-Bus network is shown. Consider generators as ideal voltage sources. If rows 1, 2 and 3 of the YBus matrix correspond to Bus 1, 2 and 3, respectively, then YBus of the network is

• A. \(\left[ \begin{array}{20 {c*}} {-\frac 3 4 j}&{\frac 1 4 j}&{\frac 1 4 j}\\\ {\frac 1 4 j}&{-\frac 3 4 j}&{\frac 1 4j}\\\ {\frac 1 4 j}&{\frac 1 4 j}&{-\frac 3 4 j} \end{array} \right]\)
• B. \(\left[ \begin{array}{20 {c*}} {-4j}&{2j}&{2j}\\\ {2j}&{-4j}&{2j}\\\ {2j}&{2j}&{-4j} \end{array} \right]\)
• C. \(\left[ \begin{array}{20 {c*}} {-\frac 1 2j}&{\frac 1 4j}&{\frac 1 4j}\\\ {\frac 1 4j}&{-\frac 1 2j}&{\frac 1 4j}\\\ {\frac 1 4j}&{\frac 1 4j}&{-\frac 1 2j} \end{array} \right]\)
• D. \(\left[ \begin{array}{20 {c*}} {-4j}&{j}&{j}\\\ {j}&{-4j}&{j}\\\ {j}&{j}&{-4j} \end{array} \right]\)