Q11. P-T diagram of an ideal gas having three different densities $\rho _ { 1 } , \rho _ { 2 } , \rho _ { 3 }$ (in three different cases) is shown in the\\
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figure. Which of the following is correct :\\
(1) $\rho _ { 1 } > \rho _ { 2 }$\\
(2) $\rho _ { 2 } < \rho _ { 3 }$\\
(3) $\rho _ { 1 } = \rho _ { 2 } = \rho _ { 3 }$\\
(4) $\rho _ { 1 } < \rho _ { 2 }$