The reversible expansion of an ideal gas under adiabatic and isothermal conditions is shown in the figure. Which of the following statement(s) is(are) correct?

(A) For an Isothermal process, the temperature is constant ∴T1=T2 (B) Adiabatic process temp. decreases. ∴T3<T1 (C) In Wisothermal, ΔU=0, so energy gets converted into work done whereas for in the adiabatic process Q=0 ∴Wisothermal>Wadiabatic (D) For isothermal process change in internal energy is constant but not in the adiabatic process. Thus ΔUisothermal=0, ΔUadiabatic=-ve, so ∴ΔUisothermal>ΔUadiabatic Hence, the correct options are A, C and D