The following remarks pertain to the properties of gases and vapours:
1. The equation of state is not by itself sufficient for the calculation of properties such as u, h and s.
2. Throttling process is an adiabatic steady flow process.
3. Increase in entropy in wet region is directly proportional to the increase in enthalpy.
(A) 1,2 and 3 (B) 1 and 2 only
(C) 1 and 3 only (D) 2 and 3 only