Adenosine, guanosine, thymidine, uridine, cytidine are all ____ but adenylic acid, guanylic acid, uridylic acid, cytidylic acid are _______.

Options

A. Nucleotides, nucleosides
B. Nucleosides, nucleotides
C. Nucleotides, nucleic acids
D. Nucleotides, nucleases

Answer

B