A planet moves around the sun. At a given point P, it is closest from the sun at a distance d₁ and has a speed v₁. At another point Q, when it is farthest from the sun at a distance d₂, its speed will be

• A

  $\frac{{\mathrm{d}}_1^2{\mathrm{v}}_1}{{\mathrm{d}}_2^2}$

• B

  $\frac{{\mathrm{d}}_2{\mathrm{v}}_1}{{\mathrm{d}}_2^2}$

• C

  $\frac{{\mathrm{d}}_1{\mathrm{v}}_1}{{\mathrm{d}}_2}$

• D

  $\frac{{\mathrm{d}}_2^2{\mathrm{v}}_1}{{\mathrm{d}}_1^2}$