In a container, a gas at NTP is slowly compressed to one fourth of its volume, its final pressure is P. In another container, a gas at NTP is suddenly compressed to one fourth of its volume, its final pressure is P', then: (take $\mathrm{\gamma }$ = 3/2)

• A

  $\frac{\mathrm{P}\text{'}}{\mathrm{P}}=2$

• B

  $\frac{\mathrm{P}\text{'}}{\mathrm{P}}=\frac{1}{2}$

• C

  $\frac{\mathrm{P}\text{'}}{\mathrm{P}}=4$

• D

  $\frac{\mathrm{P}\text{'}}{\mathrm{p}}=\frac{1}{4}$