final volume 4 V through three different thermodynamic processes as shown in Fig.Process 1 is adiabatic, 2 isothermal and 3 isobaric. If $∆{\mathrm{U}}_1∆{\mathrm{U}}_2$ and $∆{\mathrm{U}}_3$ denote the
change in internal energy of the gas in the three processes respectively, then:
 

• A

  $∆{\mathrm{U}}_1>∆{\mathrm{U}}_2>∆{\mathrm{U}}_3$

• B

  $∆\mathrm{U}1<∆{\mathrm{U}}_2<∆{\mathrm{U}}_3$

• C

  $∆{\mathrm{U}}_1>∆{\mathrm{U}}_3>∆{\mathrm{U}}_2$

• D

  $∆{\mathrm{U}}_3<∆{\mathrm{U}}_1<∆{\mathrm{U}}_2$