Just need the correct answer and explanation for c. Thanks

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C * Resitivity (\rho)=\frac{R * A}{L}Resistivity in property of material. fience remains same after metting. sow,\frac{R_{N} \times A_{N}}{L_{N}}=\frac{R_{0} \times A_{0}}{L_{0}}Given,L N=3 L 0since, voume atso remain constont. thence, A N \times L H= Ao \times L\Rightarrow \quad A_{N} \times 3 L_{0}=A_{0} \times L_{0}Non,A_{N}=\frac{A_{0}}{3}\leftarrow from eqn (ii)}\frac{R_{M} \times \frac{A_{0}}{3}}{3 L_{0}}=\frac{R_{0} \times A_{0}}{L_{0}}\Rightarrow \quad \therefore New resistance,R_{N}=9 * R_{0} \quad \Lambda_{m} ...