Electronegativity difference between a group 15 element \& P is less than electronegativity difference between another group 15 element \& P. Those group 15 elements respectively are-
(A) Bi, N
(B) $\mathrm { Sb } , \mathrm { As }$
(C) $\mathrm { Sb } , \mathrm { Bi }$
(D) N, As