An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path $$ A \rightarrow B \rightarrow C \rightarrow D \rightarrow A$$ as shown in the three cases above. Choose the correct option regarding $$\Delta U$$ :

A

$$\Delta U(\text{Case-I}) = \Delta U(\text{Case-II}) = \Delta U(\text{Case-III})$$

B

$$\Delta U(\text{Case-I}) > \Delta U(\text{Case-III}) > \Delta U(\text{Case-II})$$

C

$$\Delta U(\text{Case-III}) > \Delta U(\text{Case-II}) > \Delta U(\text{Case-I})$$

D

$$\Delta U(\text{Case-I}) > \Delta U(\text{Case-II}) > \Delta U(\text{Case-III})$$