STANDARD Physics Adiabatic Processes MCQ Question

The initial pressure and volume of gas are P and V. Now the gas is compressed adiabatically to 1/4th of its original volume. Using the relation $P_1 V_1^\gamma = P_2 V_2^\gamma$ and $\gamma = \frac{5}{3}$ for monatomic gases, we find $P_2 = 10.08 P$.