The relation between the pressure and volume In the process from state $1$ to state $2$ through the paths $A$&$B$ is shown in the diagram. One of the following is true

Select one:

a$.{(}_1{Q}_2{)}_A>{(}_1{Q}_2{)}_B$

b$.{(}_1{Q}_2{)}_A<msub\; id="EditorElement\_3661496"><mrow><mi\; id="EditorElement\_3661506">(</mi></mrow><mrow\; id="EditorElement\_3661495"><mn\; id="EditorElement\_3661492">1</mn></mrow></msub><msub\; id="EditorElement\_3661505"><mrow><mi\; id="EditorElement\_3661498">Q</mi></mrow><mrow\; id="EditorElement\_3661504"><mn\; id="EditorElement\_3661501">2</mn></mrow></msub><msub\; id="EditorElement\_3661515"><mrow><mi\; id="EditorElement\_3661507">)</mi></mrow><mrow\; id="EditorElement\_3661514"><mi\; id="EditorElement\_3661511">B</mi></mrow></msub>$

C$.{(}_1{Q}_2{)}_A={(}_1{Q}_2{)}_B$

d$.{(}_1{Q}_2{)}_A-{(}_1{Q}_2{)}_B={?}_1{W}_2$