This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
Nucleotides are 
Select and explain. 
A. Heterocyclic Compounds, B. N-Glycosides, C. Phosphorylated Nucleosides, D. O-Glycosides
C: Phosphorylated Nucleosides
Answer: C: Phosphorylated Nucleosides 
Explanation: Purines & Pyrimidines Are Heterocyclic Compounds.Nucleosides Are N-Glycosides.Nucleotides Are Phosphorylated Nucleosides .Ref: Harper&;s Biochemistry; 30th edition; Chapter 32; Nucleotides