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A graph of magnetic flux $(\oint)$ versus current (I) is shown for four inductors A, B, C and D. Larger value of self-inductance is for inductor

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A
We have $\phi=\mathrm{LI}$; or $\mathrm{L}=\frac{\phi}{\mathrm{I}}$, hence it gives self-inductance is given by the slope maximum value of self inductance.
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