The load versus elongation graph for four wires of same length and the same material is shown in figure. The thinnest wire is represented by line
Medium
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(c)
For the same load wire with maximum elongation has minimum cross-section area
As $\frac{F L}{A Y}=\Delta x$
$F, L, Y$ are fixed so $\frac{1}{A} \propto \Delta x$
$\Rightarrow O A$ is the thinnest.
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