| Column-$I$ (Scientists) | Column-$II$ (Discovery) |
| $A$. Ernst Mayr | $I$. Discovered Viroids |
| $B$. Whittaker | $II$. Gave the name virus |
| $C$. Ivanowsky | $III$. Proposed five kingdom classification |
| $D$. Diener | $IV$. Evolutionary biology |
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