Thermodynamic process is shown below on a $$P-V$$ diagram for one mole of an ideal gas. If $$V_2 = 2V_1$$, then the ratio of temperature $$\frac{T_2}{T_1}$$ is:

A

$$\sqrt{2}$$

B

$$\frac{1}{\sqrt{2}}$$

C

$$\frac{1}{2}$$

D

2