Which of the following graphs shows the variation of magnetic induction $B$ with distance $r$ from a long wire carrying current
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(c) $|\overrightarrow B | = \frac{{{\mu _0}}}{{4\pi }}.\frac{{2\pi \,i}}{r} \Rightarrow \;|\overrightarrow B | \propto \frac{1}{r}$
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