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A gas is expanded from volume \[{{V}_{{}^\circ }}\] to \[2{{V}_{{}^\circ }}\] under three different processes, as shown in the figure. Process 1 is isobaric process, process 2 is isothermal and process 3 is adiabatic  Let \[\Delta \,{{U}_{1}}\], \[\Delta \,{{U}_{2}}\] and \[\Delta \,{{U}_{3}}\] be the change in the internal energy of the gas in these three processes, then:

A) \[\Delta {{U}_{1}}>\Delta {{U}_{2}}>\Delta {{U}_{3}}\]

B)   \[\Delta {{U}_{2}}<\Delta {{U}_{1}}<\Delta {{U}_{3}}\]

C) \[\Delta {{U}_{1}}<\Delta {{U}_{2}}<\Delta {{U}_{3}}\]         

D) \[\Delta {{U}_{2}}<\Delta {{U}_{3}}<\Delta {{U}_{1}}\]