Figure 12.5 shows the P-V diagram of an ideal gas undergoing a change of state from A and B. Four different parts I,II,III and IV as shown in the figure may lead to the same change of state.
a) Change in internal energy is same in IV and III cases, but not I and II
b) Change in internal energy is same in all the four cases
c) Work done is maximum in case I
d) Work done is minimum in case II

Options

A. Only a, b are correct
B. only b, d are correct
C. only c, d are correct
D. only b and c are correct

Answer

D