Which of the two is a good conductor of heat?

ICSE Class 10 Physics 2014 Paper

Specific heat capacity of substance $A$ is $3.8 \mathrm{Jg}^{-1} \mathrm{K}^{-1}$ . whereas the Specific heat capacity of substance $B$ is $0.4 \mathrm{Jg}^{-1} \mathrm{K}^{-1}$ .