For a gas whose \(P-V-T\) behaviour is given by \(Z=1+\frac{B P}{R T}\), where \(B\) is a constant, the fugacity coefficient is

(a) \(\frac{B P}{R T}\)

(b) \(\exp \frac{B P}{R T}\)

(c) \(\ln \frac{B P}{R T}\)

(d) \(1+\frac{B P}{R T}\).