A gas obeys P(V - b) = RT. Which of the following is correct about this gas?I. Isochoric curves have slope =\[\frac{V-b}{R}\]II. sobaric curves have slope \[\frac{R}{P}\] and intercept b.III. For the gas, compressibility factor = \[1+\frac{Pb}{RT}\]IV. The attraction forces are overcome by repulsive forces.

• A. I                      
• B. II, III, IV
• C. III                   
• D. I, II, III, IV