Two solutions `A` and `B` form a negative deviation solution .The B.P. of pure `A` is less than pure `B` .Choose the CORRECT statements

(A) Boiling temperature of the mixture is always more than boiling point of `A`.
(B) Boiling temperature of azeotropic mixture is always less than boiling point of `B`.
(C) When a small amount of `A` is added to excess of `B` , B.P. of resulting mixture increases.
(D) Boiling point of azeotropic mixture is a fixed value at any external pressure