This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Microbiology Pa 1 (History, Microscopy, Stains and Structure and Physiology of Bacteria), Subject name: Microbiology
Nohern blotting used in separation and diagnosis of: 
Select and explain. 
A. Histones, B. Proteins, C. RNA, D. DNA
C: RNA
Answer: C: RNA 
Explanation: HISTONES No blotting technique PROTEINS Western blotting RNA Nohern blotting DNA Southern blotting