The equivalent conductance of NaCl at concentration C and at infinite dilution are ${\mathrm{\lambda }}_{\mathrm{C}}\text{ and }{\mathrm{\lambda }}_{\mathrm{\infty }}$ respectively The correct relationship between ${\mathrm{\lambda }}_{\mathrm{C}}\text{ and }{\mathrm{\lambda }}_{\mathrm{\infty }}$ is given as (where, the constant B is positive)

• A

  ${\mathrm{\lambda }}_{\mathrm{C}}={\mathrm{\lambda }}_{\mathrm{\infty }}+\left(\mathrm{B}\right)\mathrm{C}$

• B

  ${\mathrm{\lambda }}_{\mathrm{C}}={\mathrm{\lambda }}_{\mathrm{\infty }}-\left(\mathrm{B}\right)\mathrm{C}$

• C

  ${\mathrm{\lambda }}_{\mathrm{C}}={\mathrm{\lambda }}_{\mathrm{\infty }}-\left(\mathrm{B}\right)\sqrt{\mathrm{C}}$

• D

  ${\mathrm{\lambda }}_{\mathrm{C}}={\mathrm{\lambda }}_{\mathrm{\infty }}+\left(\mathrm{B}\right)\sqrt{\mathrm{C}}$