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The correct option is D Wood
The lightning rod requires an excellent conductor which allows the flow of charge to the ground without causing any damage. Wood is a poor conductor of electricity and it does not allow the flow of charges through it. Hence, we cannot use wood as a lightning rod whereas iron, copper and aluminium are metals which are good electrical conductors and are used in many electrical appliances.
The lightning rod requires an excellent conductor which allows the flow of charge to the ground without causing any damage. Wood is a poor conductor of electricity and it does not allow the flow of charges through it. Hence, we cannot use wood as a lightning rod whereas iron, copper and aluminium are metals which are good electrical conductors and are used in many electrical appliances.
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