In the figure shown, the heavy cylinder (radius $R$) resting on a smooth surface separates two liquids of densities $2\ \rho$ and $3\ \rho$ . The height $‘h’$ for the equilibrium of cylinder must be
  • A$3R/2$
  • B$R\sqrt {\frac{3}{2}} $
  • C$R\sqrt 2 $
  • D
    None
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