Which of the following is an equivalent cycle process corresponding to the thermodynamic cyclic process given in the figure , where, 1→2  is adiabatic ( Graphs are schematic and are not to scale)

For the  process  1→2 TVγ−1= const is not a straight lineFor the  process  2→3Isobaric process with decreasing volume (straight line passing through origin)For the  process  3→1Isochoric process with increasing temperature.