The above network contains resistors and controlled sources. \({G_{12}} = \frac{{{V_2}}}{{{V_1}}}\) is

• A. \( - \frac{4}{5}\)
• B. \( - \frac{3}{5}\)
• C. \( - \frac{2}{5}\)
• D. \( - \frac{1}{5}\)