One Roentgen Is the Amount of Radiation That Produces Ions

Multiple Choice

One roentgen is the amount of radiation that produces ions having an energy of _____.

A) 2.58 × 10⁻⁴ C/kg
B) 1 × 10⁻³ rem
C) 3.7 × 10⁴ dps
D) 100 rad