The correct statement is:
Gold has high conductivity.
Here are clarifications for the other statements:
- Aluminum has a low conductivity. (Incorrect; aluminum actually has relatively high conductivity compared to many other materials, though it is lower than that of copper.)
- Plastics have high conductivity. (Incorrect; plastics are generally insulators and have low electrical conductivity.)
- Copper has low conductivity. (Incorrect; copper is one of the best conductors of electricity, with very high conductivity.)
Thus, the only accurate statement is that gold has high conductivity.
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