\( \mathrm{KCl} \) can be used in salt bridge as electrolyte, in which of the following cells? (...

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\( \mathrm{KCl} \) can be used in salt bridge as electrolyte, in which of the following cells?
(a) \( \mathrm{Zn}\left|\mathrm{ZnCl}_{2}\right|\left|\mathrm{AgNO}_{3}\right| \mathrm{Ag} \)
(b) \( \left.\mathrm{Pb} \mid \mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\right)|| \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2} \mid \mathrm{Cu} \)
(c) \( \mathrm{Cu}\left|\mathrm{CuSO}_{4}\right|\left|\mathrm{AuCl}_{3}\right| \mathrm{Au} \)
(d) \( \mathrm{Fe}\left|\mathrm{FeSO}_{4}\right|\left|\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\right| \mathrm{Pb} \)
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