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The sun appears red at sunrise and sunset while it appears white at noon, because

AOf refraction
BIt is cooler at sunrise and at sunset
COf diffraction leading to red end of the spectrum reaching the earth.
DOf Scattering of light due to dust particles and air molecules.

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Correct Answer: D: Of Scattering of light due to dust particles and air molecules.

Explanation: The correct answer is D: Of Scattering of light due to dust particles and air molecules. The sun appears red at sunrise and sunset due to scattering of light. At these times, sunlight travels a longer path through the atmosphere, scattering blue light away and allowing red light to reach the eye.

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