Which given character is true for nitrogen bases found in living organism?

(i) Adenine, guanine, cytosine, uracil and thymine are nitrogen bases.

(ii) When nitrogen base is attached to a sugar, they are called nucleosides.

(iii) If a phosphate group is also found esterified to the sugar of nucleosides then they are called nucleotides.

(iv) Adenosine, guanosine, thymidine, uridine and cytidine are nucleotides.

(v) Adenylic acid, thymidylic acid, guanylic acid, uridylic acid and cytidylic acid are nucleosides.

(vi) Nucleic acids like DNA and RNA consist of nucleotides only.