This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Histones are: 
Select and explain. 
A. Identical to protamine, B. Proteins rich in lysine and arginine, C. Proteins with high molecular weight, D. Insoluble in water and very dilute acids
B: Proteins rich in lysine and arginine
Answer: B: Proteins rich in lysine and arginine 
Explanation: These are proteins containing unusually higher concentration of basic amino acids.
Reference: Vasudevan 7th  ed, pg 576