The equation of a tangent to the parabola $y^2 = 4ax$ making an angle $\theta$ with the $x$-axis is
- A$y = x \cot \theta + a \tan \theta$
- B$x = y \tan \theta + a \cot \theta$
- C$y = x \tan \theta + a \cot \theta$
- DNone of these
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