How many molecules of histones H2A,H2B,H3,and H4 (respectively)comprise a single nucleosome?

A)one each(i.e., 1, 1, 1, 1)
B)two each(i.e., 2, 2, 2, 2)
C)three each(i.e., 3, 3, 3, 3)
D)1,2,2,2
E)2,2,2,1