| Column $X$ | Column $Y$ |
|---|---|
| $(1)$ Worker | $(P)$ Sterile female |
| $(2)$ Queen | $(Q)$ Fertile female |
| $(3)$ Drone | $(R)$ Fertile male |
| $(4)$ Hilsa | $(S)$ Edible marine fish |
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| Column-$I$ (Name) | Column-$II$ (Relations) |
| $A$. Bombyx mori | $P$. Disease of mulberry |
| $B$. Morus alba | $Q$. Centre where silkworm eggs are produced and supplied |
| $C$. Grainage | $R$. Silk moth |
| $D$. Powdery mildew | $S$. Mulberry plant |
| $T$. Freshly hatched silkworm |
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