# The molar conductivities $\bigwedge^{\circ} NaOAc$ and $\bigwedge^{\circ} HCl$ at infinite dilution in water at $25^{\circ}C$ are $91.0$ and $426.2\; S\; cm^2/mol$ respectively. To calculate $\bigwedge^{\circ} HOAc$, the additional value required is :
( A ) $\bigwedge^{\circ} H_2O$
( B ) $\bigwedge^{\circ} KCl$
( C ) $\bigwedge^{\circ} NaCl$
( D ) $\bigwedge^{\circ} NaOH$