HETP is numerically equal to HTU, only when the operating line
(A) Lies below the equilibrium line
(B) Lies above the equilibrium line
(C) And equilibrium lines are parallel
(D) Is far from the equilibrium line
(A) Lies below the equilibrium line
(B) Lies above the equilibrium line
(C) And equilibrium lines are parallel
(D) Is far from the equilibrium line