c
Let the speed of the ejection of the liquid through the holes be \(v\), Then according to the equation of continuity,

\(\pi {R^2}V = n\pi {r^2}v\,\,or\,\,v = \frac{{\pi {R^2}V}}{{n\pi {r^2}}} = \frac{{V{R^2}}}{{n{r^2}}}\)