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For cell representation:
Which of the following is correct?
(i) \( \mathrm{Cu} \) is reducing agent.
(ii) Overall cell reaction is \( \mathrm{Cu}(\mathrm{s})+2 \mathrm{Ag}^{+}(\mathrm{aq}) \longrightarrow \mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{s}) \)
(iii) \( \mathrm{Cu} \) is cathode
(iv) \( \mathrm{Ag} \) is anode
(a) (ii), (iii) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i) and (ii)
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