WmK⁻¹;
JmK⁻¹;
Jm⁻¹;K⁻¹;
Wm⁻¹;K⁻¹;
Correct option is D. Wm⁻¹K⁻¹; In the International System of Units (SI), thermal conductivity is measured in watts per meter-kelvin i.e. Wm⁻¹K⁻¹;