Unit of radiation exposure:: (A) Rad, (B) Gray, (C) Sievert, (D) Roentgen
Answer is D. Ans. (d) RoentgenRef: Essentials of radiological Science 2nd ed. 13* Unit of radiation exposure- Roentgen (SI= Coloumb/ kg)* Unit of absorbed radaition- RAD (SI= GRAY)* Unit of biologic effectiveness- Rem (SI= Sievert)