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  1. The oil in the wick of an oil lamp rises up due to:

    2. A.

     Capillary action
    B.

     Low viscosity of oil
    C.

     Gravitational force
    D.

     Pressure difference

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    Answer : Option A

    Explanation :

    The oil in the wick of an oil lamp rises up due to capillary action. This effect is due to surface tension of liquids. The wick here acts as a capillary tube.

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