Correct statement among the following regarding conductivity in solids is -

1.   κmetalsκinsulators<κsemiconductors

2.   κmetalsκinsulators<κsemiconductors

3.   κmetals,κsemiconductors>κinsulators=zero

4.  κmetals<κsemiconductors>κinsulatorszero

HINT: In an insulator, an energy gap exists between the conduction band and valence band is high.
Explanation:
The conductivity of metal, insulators, and semiconductors can be represented in the term of κ (Kappa) which depends upon the energy gap between the valence band and conduction band.
Hence, the correct order is 
                      κmetalsκinsulators<κsemiconductors