Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a __________________?

A. Pressure
B. Temperature
C. Both A. & B
D. Neither A. nor B

A. 0
B. 1
C. 2
D. 3

A. Is zero
B. Increases
C. Decreases whereas the entropy increases
D. And entropy both decrease

A. Increase
B. Decrease
C. No change
D. None of these

A. Pressure
B. Composition
C. Temperature
D. All (A), B. and (C)