Steam at 1 MPa and 300°C is throttled adiabatically to a pressure of 0.4 MPa. If the change in kinetic energy is negligible, the specific volume of the steam after throttling is
(a) 0.358 m3/kg
(d) 0.646 m3/kg
(b) 0.233 m3/kg
(e) 0.655 m3/kg
(c) 0.375 m3/kg