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For the following \( \mathrm{E}^{\circ} \) values of half cells
(i) \( \mathrm{A}^{3-} \rightarrow \mathrm{A}^{-2}+\mathrm{e} ; \quad \mathrm{E}^{\mathrm{o}}=1.5 \mathrm{~V} \)
(ii) \( \mathrm{B}^{+}+\mathrm{e} \rightarrow \mathrm{B} ; \quad\quad \mathrm{E}^{\mathrm{o}}=0.5 \mathrm{~V} \)
(iii) \( \mathrm{C}^{2+}+\mathrm{e} \rightarrow \mathrm{C}^{+} ; \quad \mathrm{E}^{0}=0.5 \mathrm{~V} \)
(iv) \( \mathrm{D} \rightarrow \mathrm{D}^{2+}+2 \mathrm{e} ; \quad \mathrm{E}^{\mathrm{o}}=-1.15 \mathrm{~V} \)
What combination of two half cells would result in a cell with the largest potential?
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