What will be the concentration of $NaCl$ solution,if the molar conductivity and conductivity of $NaCl$ solution are $124.3 \ \Omega^{-1} \ cm^{2} \ mol^{-1}$ and $1.243 \times 10^{-4} \ \Omega^{-1} \ cm^{-1}$ respectively?
- A$0.001 \ mol \ L^{-1}$
- B$0.01 \ mol \ L^{-1}$
- C$0.02 \ mol \ L^{-1}$
- D$0.1 \ mol \ L^{-1}$
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