| List-$I$ (Element) | List-$II$ (Application) |
|---|---|
| $A$. $Cs$ | $I$. High temperature thermometer |
| $B$. $Ga$ | $II$. Water repellent sprays |
| $C$. $B$ | $III$. Photoelectric cells |
| $D$. $Si$ | $IV$. Bullet proof vest |
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