Consider the four processes $A,B,C,D$ shown in the graph given below

List I shows process & List II gives value of index ${}^{\prime }{n}^{\prime }$ for the equation $P{V}^n=\text{const}$
Match List I with list II.
$\begin{array}{cccc}& \text{List I}& & \text{List II}\\ A.& A& 1.& 0\\ B& B& 2& 1\\ C& C& 3.& 1.4\\ D& D& 4.& \infty \end{array}$

The correct option is B $A-1,B-2,C-3,D-4$
Horizontal line $A$ corresponds to constant pressure or isobaric process $(n=0)$
Curve $B$ corresponds to Isothermal process $(n=1)$
Curve $C$ corresponds to adiabatic process $(n=1.4)$
Vertical line $D$ corresponds to constant volume or isochoric process $(n=\infty )$