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Consider the following statements about ...

Consider the following statements about e.m. wave and choose the correct ones `S_1`: em wave having wavelengths 1000times smaller than light wave are called X-rays.
`S_2`: Ultraviolet wave are used in the treatment of swollen joints.
`S_3`: Alpha and gamma rays are e.m. wave
`S_4`: de-Broglie wave are not electromagentic in nature
`S_5`: EM wave exhibits polarization while sound wave do not.

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