To solve this problem, we need to analyze the T-V curves of an ideal gas at different pressures.$\\$The graph shows three curves labeled $P_1, P_2,$ and $P_3$ with dotted lines representing Charles's law.$\\$According to Charles's law, for a given amount of gas at constant pressure, the volume is directly proportional to the temperature.$\\$This means the dotted lines represent isobaric processes (constant pressure).$\\$The solid curves deviate from the dotted lines, indicating different pressures.$\\$Observations from the graph:$\\$• The curve for $P_1$ is the steepest, indicating the highest pressure.$\\$• The curve for $P_3$ is the least steep, indicating the lowest pressure.$\\$• The curve for $P_2$ is between $P_1$ and $P_3. \\$Thus, the correct order of pressures is:$\\ P_1 > P_2 > P_3 \\$Therefore, the correct option is 2.