The value of the integral $$\oint \left ( \frac{6z}{2z^{4} - 3z^{3} + 7z^{2} - 3z + 5 } \right )dz$$ evaluated over a counter-clockwise circular contour in the complex plane enclosing only the pole $z = i$, where $i$ is the imaginary unit, is

1. $\left ( -1 + i \right )\pi$
2. $\left ( 1 + i \right )\pi$
3. $2\left ( 1 - i \right )\pi$
4. $\left ( 2 + i \right )\pi$