The recommended monthly limit to the fetus is: (A) 0.05 mSv, (B) 0.1 mSv, (C) 0.5 mSv, (D) 2 mSv
Answer is C. The NCRP recommends a monthly limit of 0.5 mSv (50 mrem) to the embryo or fetus once a woman declares her pregnancy. In contrast to this, the ICRP recommends a limit of 2 mSv (200 mrem) to the surface of the woman&;s abdomen (lower trunk) for the remainder of the pregnancy. These recommendations are essentially similar and are designed to limit the risk of mental retardation, other congenital malformations, and carcinogenesisReference: Eric J Hall Textbook of Radiobiology for Radiologist; 5th edition