If a two phase system is in physical equilibrium; then it means that, the

• A. escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase.
• B. temperature of the liquid phase is equal to that of the vapor phase.
• C. total pressure throughout the liquid phase is equal to that throughout the vapor phase.
• D. all (a), (b) and (c).