For $z=a^{2} x^{3} y^{\frac{1}{2}}$, where $a$ is a constant. If percentage error in measurement of $x$ and $y$ are $4 \%$ and $12 \%$, respectively, then the percentage error for $z$ will be $%$
  • A$18$
  • B$188$
  • C$78$
  • D$15$
JEE MAIN 2022, Easy
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