Which of the following equation(s) is/are incorrect?

• A

  ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{KCl}\right)}^{\circ }-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^{\circ }={\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{KBr}\right)}^{\circ }-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaBr}\right)}^{\circ }$

• B

  ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{KBr}\right)}^{\circ }-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaBr}\right)}^{\circ }={\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{KI}\right)}^{\circ }-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaI}\right)}^{\circ }$

• C

  ${\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaBr}\right)}^{\circ }-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{NaCl}\right)}^{\circ }={\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{KBr}\right)}^{\circ }-{\mathrm{\Lambda }}_{\mathrm{m}\left(\mathrm{KCl}\right)}^{\circ }$

• D

  None of the above