The values of conductivity of some materials at 298 .15 K in Sm ^ -...

Molar conductivity is the conductance property of a solution containing one mole of the electrolyte, or it is a function of the ionic strength of a solution or the concentration of salt. 

${Λ}_{m} = K / C$

Where $K$ is the specific conductivity and

$C$ is the concentration in mole per litre.

Conductivity \left({Sm}^{- 1}\right)</p><p>\left$\begin{array}{ll}2 .1 \times {10}^{3} \\ 1 .2 \times 10 \\ 3 .91 \\ 1 \times {10}^{3}\end{array}$$conductors at$298 .15 K$</p><p>$1 \times {10}^{- 16}$Insulator at$298 .15 K</p><p>\left$\begin{array}{ll}1 .5 \times {10}^{- 2} \\ 1 \times {10}^{- 7}\end{array}$\right\} Semiconductor at $298 .15 K$

Therefore number of conductors is $4$.