Which of the following is correct about viroids ?

They have DNA with a protein coat.

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They have free DNA without a protein coat.

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They have RNA with a protein coat.

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They have free RNA without a protein coat.

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Solution

The correct option is D
They have free RNA without a protein coat.

The correct option is D.
Explanation for correct option:
Viroids are the smallest infectious pathogens known.
They have free RNA without the protein coat which is called a capsid.
Final answer: Viroids have free RNA without a protein coat.

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