At a certain temperature, the value of the slope of the plot of osmotic pressure $(\pi)$ against concentration $(C \text{ in } mol \ L^{-1})$ of a certain polymer solution is $291 \ R.$ The temperature at which osmotic pressure is measured is: $(R \text{ is the gas constant})$

  • A
    $271^{\circ} C$
  • B
    $18^{\circ} C$
  • C
    $564 \ K$
  • D
    $18 \ K$

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