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| Column-$I$ | Column-$II$ |
|---|---|
| $1$. Ivanowsky | $p$. Discovered viroids. |
| $2$. Tulasne | $q$. Studied algae. |
| $3$. Diener | $r$. Coined the term virus. |
| $4$. Beijerinck | $s$. First to discover lichen. |
| $t$. Studied mycology. | |
| $u$. First to discover $TMV$. |
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