Extra uridine rich small sized RNA is

5 S RNA

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sn RNA

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sc RNA

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5.8 S RNA

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Solution

The correct option is B sn RNA
Small nuclear ribonucleic acid (snRNA) is a class of small RNA molecules that are found within the splicing speckles and Cajal bodies of the cell nucleus in eukaryotic cells. The uridine-rich snRNA, with the exception of U7, form the core of the spliceosome.
So, the correct answer is 'snRNA.'

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