What is the function of 3 and 4?

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Q 2348878703.     Observe the diagram of
an electric bulb shown below carefully and
answer the question that follow.
What is the function of 3 and 4?
A

Provide support to the bulb

B

Act as positive and negative terminals of the bulb

C

Act as source of energy to the filament of the bulb

D

All of the above

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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