(2) Which of following statement is correct:

(A) Three-phase equilibrium in a ternary system exists at a fixed temperature and pressure

(B) Three-phase equilibrium in a ternary system exists at a fixed pressure and certain range of temperature

(C) Three-phase equilibrium in a ternary system exists at a particular temperature

(D) A ternary phase diagram (triangle) is equilateral

(E) A ternary phase diagram (triangle) is plotted at a fixed pressure and temperature

(F) A ternary phase diagram (triangle) is plotted at a fixed pressure and certain range of temperature