Match List-$I$ with List-$II$:
List-$I$ List-$II$ $a$. $Be$ $i$. Treatment of cancer $b$. $Mg$ $ii$. Extraction of metals $c$. $Ca$ $iii$. Incendiary bombs and signals $d$. $Ra$ $iv$. Windows of $X$-ray tubes $v$. Bearings for motor engines
Choose the most appropriate answer from the options given below:
| List-$I$ | List-$II$ |
| $a$. $Be$ | $i$. Treatment of cancer |
| $b$. $Mg$ | $ii$. Extraction of metals |
| $c$. $Ca$ | $iii$. Incendiary bombs and signals |
| $d$. $Ra$ | $iv$. Windows of $X$-ray tubes |
| $v$. Bearings for motor engines |
Choose the most appropriate answer from the options given below:
- A$a-iv, b-iii, c-ii, d-i$
- B$a-iv, b-iii, c-ii, d-v$
- C$a-iii, b-iv, c-ii, d-i$
- D$a-iv, b-ii, c-iii, d-i$
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