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
Molecular interaction, found in the structure ofDNA - 
Select and explain. 
A. Hydrogen bond, B. Glycosidic bond, C. Covalent interactions, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is'd' i.e., All of the above