The locus of the point of intersection of the straight lines $tx - 2y - 3t = 0$ and $x - 2ty + 3 = 0$ $(t \in R)$ is

  • A
    an ellipse with eccentricity $\frac{2}{\sqrt{5}}$
  • B
    an ellipse with the length of major axis $6$
  • C
    a hyperbola with eccentricity $\sqrt{5}$
  • D
    a hyperbola with the length of conjugate axis $3$

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