Calculate the molar conductivity of $CH_2ClCOOH$ at zero concentration if molar conductivities of $HCl$,$KCl$,and $CH_2ClCOOK$ at zero concentration are $4.2$,$1.4$,and $1.1 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ respectively.
- A$3.9 \ \Omega^{-1} \ cm^2 \ mol^{-1}$
- B$4.5 \ \Omega^{-1} \ cm^2 \ mol^{-1}$
- C$6.6 \ \Omega^{-1} \ cm^2 \ mol^{-1}$
- D$1.7 \ \Omega^{-1} \ cm^2 \ mol^{-1}$
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