Which among the following nitrogen bases of p | vedclass

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(A) Nitrogenous bases in nucleic acids are classified into two types: purines and pyrimidines.$1$. Pyrimidines are heterocyclic compounds containing t

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Guanine

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(A) Nitrogenous bases in nucleic acids are classified into two types: purines and pyrimidines.$1$. Pyrimidines are heterocyclic compounds containing two nitrogen atoms in a six-membered ring. Examples include $Cytosine$,$Uracil$,and $Thymine$.$2$. Purines are heterocyclic compounds consisting of a six-membered ring fused to a five-membered ring,containing four nitrogen atoms. Examples include $Adenine$ and $Guanine$.Therefore,$Guanine$ is a purine derivative,not a pyrimidine derivative.

Which among the following nitrogen bases of polynucleotides is $NOT$ derived from pyrimidine?

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