<prompt> 1 grayis -I rad100 rad1 rem100 rem  <response>: Ans. is b i.e., 100 rad o 100 Rad is equal to 1 gray or 1 rad is equal to 0?01 gray.Quantity measuredOld unitNew SI unit RadioactivityCurieBecquerel1 curie 3?7 x 1010 Becquerel1 Becquerel 2?7 x 10-11 curieRadiation exposureRoentgenColumbcm Absorbed doseRadGray Gy100 rad 1 Gray1 rad 0?01 GrayDose equivalentRemSievert Sv100 Rem 1 Sievert1 Rem 0?01 Sievert 