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| धातुएं | अयस्क |
|---|---|
| $1$. बेरियम | $d$. विथेराइट |
| $2$. मैग्नीशियम | $a$. कार्नालाइट |
| $3$. पोटेशियम | $b$. सिल्वाइन |
| $4$. स्ट्रोंटियम | $c$. सेलेस्टाइन |
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