The volume of an ideal gas $(\gamma=1.5)$ is changed adiabatically from $5$ litres to $4$ litres. The ratio of initial pressure to final pressure is:
  • A$\frac{4}{5}$
  • B$\frac{16}{25}$
  • C$\frac{8}{5 \sqrt{5}}$
  • D$\frac{2}{\sqrt{5}}$
JEE MAIN 2024, Diffcult
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