The product of the lengths of the perpendiculars drawn from the foci of the ellipse $\frac{x^2}{9}+\frac{y^2}{25}=1$ to the tangent at any point on the ellipse is

• A

  6
• B

  7
• C

  8
• Correct answer
  D

  9

Hence, the correct answer is option: 'D'.