Question

Which of the following is excellent conductor of electricity in solid form?
A. Nacl
B. Diamond
C. Mercury
D. None​

Answer 1

Explanation:

$A. Nacl$

hope it helps you..

Answer 2

Answer:

B is the answer

explanation

Unlike most electrical insulators, diamond is a good conductor of heat because of the strong covalent bonding and low phonon scattering. Thermal conductivity of natural diamond was measured to be about 2200 W/(m·K), which is five times more than silver, the most thermally conductive metal.

I have no idea what that means but I just pasted it for confirming

hope it helped :D