Which among the following statements is true for conductivity?

What is the $SI$ unit of conductivity?

The molar conductivities of $KCl$,$NaCl$,and $KNO_3$ are $152$,$128$,and $111 \ S \ cm^2 \ mol^{-1}$ respectively. The molar conductivity of $NaNO_3$ is ............. $S \ cm^2 \ mol^{-1}$.

$A$ $0.5\,M\,NaOH$ solution offers a resistance of $31.6\,\Omega$ in a conductivity cell at room temperature. What shall be the approximate molar conductance of this $NaOH$ solution if the cell constant of the cell is $0.367\,cm^{-1}$? (in $S\,cm^2\,mol^{-1}$)

What will be the concentration of a solution of an electrolyte if its molar conductivity and conductivity are respectively $230 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ and $0.0115 \ \Omega^{-1} \ cm^{-1}$ at $298 \ K$ (in $M$)?

Which of the following $M$ $KCl$ solutions has the lowest value of equivalent conductance?