Question
Which among the following has $E$ configuration?

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$A$. has been used in spaceship
$B$. has as efficiency of $40 \%$ to produce electricity
$C$. uses aluminium as catalysts
$D$. is eco-friendly
$E$. is actually a type of Galvanic cell only

Standard entropy change for the above reaction is .....$J\,{K^{ - 1}}\,mo{l^{ - 1}}$
$(A)$ Na and excess of $NH _3$
$(B)$ $K$ and excess of $O _2$
$(C)$ $Cu$ and dilute $HNO _3$
$(D)$ $O _2$ and $2$-ethylanthraquinol