DNA differs from RNA in having

Cytosine but no guanine

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Thymine but no uracil

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Uracil but no thymine

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Thymine but no cytosine

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Solution

The correct option is B Thymine but no uracil
The nitrogenous bases are purines and pyrimidines. The purines are adenine and guanine. The pyrimidines are thymine, uracil, and cytosine.
DNA differs from RNA in nitrogenous bases.
In DNA, the thymine present but in RNA it is replaced by uracil.
So, the correct answer is option B.

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