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
True statements about DNA structure: 
Select and explain. 
A. All nucleotides are involved in linkage, B. Antiparallel, C. Bases are perpendicular to DNA, D. All
D: All
Answer: D: All 
Explanation: A i.e. All nucleotides are involved in linkage; B i.e. Antiparallel; C i.e. Bases perpendicular to DNA