The work done in cyclic process is

Question

$(a)\;\pi \;(\large\frac{P_{2}-P_{1}}{2})^2\qquad(b)\;\pi\;(\large\frac{V_{1}-V_{2}}{2})^2\qquad(c)\;\large\frac{\pi}{4}\;(P_{1}-P_{2})\;(V_{2}-V_{1})\qquad\;(D) $$\large\frac{\pi}{4}\;$$\large\frac{(V_{2}-V_{1})}{(P_{1}-P_{2})}$$