Which of the following is the natural source of light?

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Sun

Tube light

Electric bulb

None of these

answer is A.

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Detailed Solution

Sun is the natural source of light.
Natural light sources occur in nature on their own, i.e. they are not made by humans—for example, the sun and stars. However, many living things emit light, including angler fish, flashlight fish, glowworms, sea pens, corals, honey mushrooms, and so on.
Tubelight, and electric bulbs are artificial or man made source of light.

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