The correct option is D Nucleic acids, histone and non-histone proteins
Most of the DNA of the eukaryotic cell is concentrated in the nucleus as chromatin material as the complex with histone proteins. Chromatin is a fibrous heredity material formed by DNA-histone complex (nucleosome) with some non-histone protein. Histone proteins are required to package DNA inside the eukaryotic nucleus. Thus, the correct answer is option C.