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{:(" Column - I "," Coumn - II" ),(" a) ...

`{:(" Column - I "," Coumn - II" ),(" a) ""Electromagnet"," P) ""Trains"),(" b) ""D . C . Motor"," Q) ""Telegraph"),(" c) ""MRI"," R) ""Power Plane"),(" d) ""Electric Generator"," S) ""Medicine"):}`

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MRI does not use ionizing radiation, as involved in X-rays, and is generally safe and harmless procedure.
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