The molar conductivities ${\Lambda }_{\text{NaOAc}}^{\circ }$ and ${\Lambda }_{\text{HCl}}^{\circ }$ at infinite dilution in water at $25^{\circ }\text{C}$ are $91.0$ and $426.2{\text{S cm}}^2/\text{mol}$ respectively. To calculate ${\Lambda }_{\text{HOAc}}^{\circ }$, the additional value required is:

1. A
   ${\Lambda }_{{\text{H}}_2\text{O}}^{\circ }$
2. B
   ${\Lambda }_{\text{KCl}}^{\circ }$
3. C
   ${\Lambda }_{\text{NaOH}}^{\circ }$
4. D
   ${\Lambda }_{\text{NaCl}}^{\circ }$