Carnot cycle (reversible) of a gas represented by a Pressure-Volume curve is shown in the diagram Consider the following statements I. Area ABCD = Work done on the gas II. Area ABCD = Net heat absorbed III. Change in the internal energy in cycle = 0 Which of these are correct [AMU (Med.) 2001]

• A.            I only                                       
• B.            II only                                      
• C.            II and III                                  
• D.            I, II and III