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There is a mistake in the given classification table.
Non - conductor of electricity       Conductor of electricity

Wool                                               Copper

Cotton                                            Brass

Plastic                                            Iron

Cork                                               Steel

Graphite                                          Silver

Which of the following is placed incorrectly in the groups?

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Graphite

Wool

Iron

Silver

answer is B.

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Graphite is a conductor of electricity

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There is a mistake in the given classification table. Non - conductor of electricity Conductor of electricity Wool Copper Cotton Brass Plastic Iron Cork Steel Graphite Silver Which of the following is placed incorrectly in the groups?