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Q. No.The skeletal formula (showing numbering convention for substituent groups) of a simple aromatic ring shown below will be a part of the structure of all the following except:
| 1. | Thymine | 2. | Cytosine |
| 3. | Uracil | 4. | Adenine |
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Subtopic: Â Nucleic Acid: Nucleotides |
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