The locus of the point of intersection of the lines $\frac{x}{a} + \frac{y}{b} = \lambda$ and $\frac{x}{a} - \frac{y}{b} = \frac{1}{\lambda}$ (where $\lambda$ is a parameter) is:
- A$A$ circle
- B$A$ parabola
- CAn ellipse
- D$A$ hyperbola
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