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Match the metals given in Column I with the relative procedure of extraction given in column II
Column I Column II
A. lron p. Ore of Reduction by carbon
B. lead q. Auto-reduction
C. Copper r. Reduction by Al
D. Chromium s. Hydrometallurgical process

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A - p ; B - p,q ; C - q,s ; D - r

A - q,p ; B - q,r ; C - s ; D - p

A - p ; B - q,r ; C - r ; D - s,p

A - s ; B - p,r ; C - q ; D - r,p

answer is A.

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Detailed Solution

$A \to p; B \to p, q; C \to q, s; D \to r$

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