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Two communicating vessels contain mercury. The diameter of one vessel is $n$ times larger than the diameter of the other. A column of water of height $ h$  is poured into the left vessel. The mercury level will rise in the right-hand vessel ($s =$ relative density of mercury and $\rho  = $ density of water) by
  • A$\frac{{{n^2}h}}{{{{(n + 1)}^2}s}}$
  • B$\frac{h}{{({n^2} + 1)\,s}}$
  • C$\frac{h}{{{{(n + 1)}^2}s}}$
  • D$\frac{h}{{{n^2}s}}$
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