A \( 20 \% \mathrm{Zn}+80 \% \mathrm{Cu} \)
B \( 40 \% \mathrm{Zn}+20 \% \mathrm{Cu} \)
C \( 20 \% \mathrm{Zn}+80 \% \mathrm{Ni} \)
D \( 20 \% \mathrm{Ni}+80 \% \mathrm{Cu} \)
Correct Answer: Option A
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