The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the liquid in the tube is V, the speed of the ejection of the liquid through the holes is:

• A

  $\frac{{\mathrm{V}}^2\mathrm{R}}{\mathrm{nr}}$

• B

  $\frac{{\mathrm{VR}}^2}{{\mathrm{n}}^2{\mathrm{r}}^2}$

• C

  $\frac{{\mathrm{VR}}^2}{{\mathrm{nr}}^2}$

• D

  $\frac{{\mathrm{VR}}^2}{{\mathrm{n}}^3{\mathrm{r}}^2}$