| Metals are refined by using different methods. Which of the following metals refined by electrolytic refining? |
| (i) Ag |
| (ii) Cu |
| (iii) Na |
| (iv) Al |
A) (i) and (ii)
B) (ii) and (iii)
C) (i) and (iii)
D) (iii) and (iv)
Correct Answer: A
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