The conductivity of centimolar solution of $\mathrm{KCl}$ at $25°\mathrm{C}$ is $0.0210 {\mathrm{ohm}}^{-1} {\mathrm{cm}}^{-1}$ and the resistance of the cell containing the solution at $25°\mathrm{C}$ is $60 \mathrm{ohm}$. The value of cell constant is

• A

  $3.34 {\mathrm{cm}}^{-1}$
• B

  $1.34 {\mathrm{cm}}^{-1}$
• C

  $3.28 {\mathrm{cm}}^{-1}$
• Correct answer
  D

  $1.26 {\mathrm{cm}}^{-1}$

Hence, the correct answer is option: 'D'.