Which of the following will allow current to pass through it?

Iron nails

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Distilled water

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Silk thread

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Glass rod

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Solution

The correct option is A Iron nails
Since iron nails are made of iron, a metal, they will allow current to pass through it. Rest of the materials silk thread, glass rod and Distilled water are not good conductors of electricity.
Salted water, although conducts electric current.

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