If $a, b, c$ are the percentage errors in the measurement of $A, B$ and $C$, then the percentage error in $ABC$ would be approximately
  • A$abc$
  • B$a + b + c$
  • C$ab + bc + ac$
  • D$\frac{a}{b}\,\, + \;\,\frac{b}{c}\,\, + \;\,\frac{c}{a}$
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