The length of the perpendicular from the point $P(a, b)$ to the line $\frac{x}{a} + \frac{y}{b} = 1$ is

  • A
    $\left| \frac{\sqrt{a^{2} + b^{2}}}{ab} \right|$ units
  • B
    $\left| \frac{ab}{\sqrt{a^{2} + b^{2}}} \right|$ units
  • C
    $\left| \frac{b^{2}}{\sqrt{a^{2} + b^{2}}} \right|$ units
  • D
    $\left| \frac{a^{2}}{\sqrt{a^{2} + b^{2}}} \right|$ units

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