<prompt> Curie is a unit of-RadioactivityRadiation exposureAbsorbed doseDose equivalent  <response>: Ans. is a i.e. Radioactivity Old unit of radioactivity is Curie and new unit SI is Becquerel. Old unit of radiation exposure is Roentegn and new unit SI is ColumbcmQuantity measuredOld unitNew SIunit RadioactivityCurieBecquerel1 curie 3.7 x 101 becquerel -2.7 x 10Radiation exposureRoentgenColumbcm Absorbed doseRadGray100 rad 1 gray1 rad 0.01 grayDose equivalentRemSievert Sv100 rem 1 SvIrem 0.01 Sv 