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An electric circuit made by a student is...

An electric circuit made by a student is incomplete because one of the wires is too short to connect with the other wire as shown in the given figure. In order to glow the bulb, he has to connect the open ends by inserting an object between them.

Which of the following objects should the student insert between the open ends?

A

Nail

B

Bottle

C

Glass sheet

D

Rubber band

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