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     EduGorilla 
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    Flash light equipped with a new set of batteries produces bright white light. As the batteries wear out,

    Options :-

    1. the intensity of light gets reduced with no change in its colour
    2. the colour of light changes (first to yellow and then red) with no change in intensity
    3. they stop working suddenly while giving white light
    4. the colour of light changes to red and its intensity gets reduced
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