Question
What is the relationship between the two structures shown ?



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| List-1 Applications | List-II Batteries/Cell | ||
| (A) | Transistors | (I) | Anode - Zn/Hg; Cathode - HgO+C |
| (B) | Hearing aids | (II) | Hydrogen fuel cell |
| (C) | Invertors | (III) | Anode-Zn;Cathode Carbon |
| (D) | Apollo space ship | (IV) | Anode-Pb;Cathode Pb | PbO₂ |
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