Which statements are correct for viroids? (i) T.O. Diener discovered them in 1971. (ii) They are free RNA without a protein coat. (iii) They possess high molecular weight RNA. (iv) They can cause potato spindle tuber disease.
- A(i) and (iii)
- B(i), (ii) and (iv)
- CAll
- DOnly (iii)
✓ Correct answer: B
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