$n$ moles of an ideal gas undergoes a process $\mathrm{A}\to \mathrm{B}$ as shown in the figure. The maximum temperature of the gas during the process will be:

• A

  $\frac{9\mathrm{ }{\mathrm{P}}_0{\mathrm{V}}_0}{2\mathrm{n}\mathrm{R}}$
• B

  $\frac{9\mathrm{ }{\mathrm{P}}_0{\mathrm{V}}_0}{\mathrm{n}\mathrm{R}}$
• Correct answer
  C

  $\frac{9\mathrm{ }{\mathrm{P}}_0{\mathrm{V}}_0}{4\mathrm{n}\mathrm{R}}$
• D

  $\frac{3\mathrm{ }{\mathrm{P}}_0{\mathrm{V}}_0}{2\mathrm{n}\mathrm{R}}$

Hence, the correct answer is option: 'C'.