Van der waal's equation for a gas is stated as , $\;p=\large\frac{nRT}{V-nb}- a(\large\frac{n}{v})^{2}\;$ .This equation reduces to the perfect gas equation $\;p=\large\frac{nRT}{V}\;$ when ,

Question

(a) Temperature is sufficiently high and pressure is low .\[\](b) Temperature is sufficiently low and pressure is high .\[\](c) Both temperature and pressure are very high.\[\](d) Both temperature and pressure are very low.