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Equation of gas in terms of pressure $(P),$ absolute temperature $(T)$ and density $(d)$ is
  • A$\frac{{{P_1}}}{{{T_1}{d_1}}} = \frac{{{P_2}}}{{{T_2}{d_2}}}$
  • B$\frac{{{P_1}{T_1}}}{{{d_1}}} = \frac{{{P_2}{T_2}}}{{{d_2}}}$
  • C$\frac{{{P_1}{d_2}}}{{{T_1}}} = \frac{{{P_2}{d_1}}}{{{T_1}}}$
  • D$\frac{{{P_1}{d_1}}}{{{T_1}}} = \frac{{{P_2}{d_2}}}{{{T_2}}}$
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