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{:(, "column"-I,, "column-II"),((a) ,"ch...

`{:(, "column"-I,, "column-II"),((a) ,"change on electrons (magnitude)", (p) ,1.6022xx10^(-19)C),((b),ed//m_(e),(q),1.758820xx10^(11)CKg^(1)),((c ) , "mass of prton ".m_(p),(r),1.00867u),((d),"Mass of nueutron"m_(n),(s),1.00727u),(,,(t),4.8xx10^(-10)"esu"):}`

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The correct Answer is:
(a-p,t);(b-p);(c-s);(d-r0
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