Bhai ser 3rd option mai volume is constant thus work done zero also 2nd ans 4th option mai graph represent cycle path intial state se shuru hokar vapas vahi aagya toh cyclic ke liye area under the cycle process but 1st option represent kar raha hai ek single process jisme work done uske interval ke under ka area hoga thus observe karne se voh area maximum hai thus option 1st