The product of the perpendicular distances from any point on the hyperbola $\frac{x^2}{a^2}-\frac{y^2}{b^2}=1$ to its asymptotes is

  • A
    $\frac{a^2 b^2}{a^2-b^2}$
  • B
    $\frac{a^2 b^2}{a^2+b^2}$
  • C
    $\frac{a^2+b^2}{a^2 b^2}$
  • D
    $\frac{a^2-b^2}{a^2 b^2}$

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