Final answer:
The NCRP Recommended annual occupational dose limit for ionizing radiation exposure is 50 mSv. Therefore the correct answer is option (A).
Step-by-step explanation:
The NCRP (National Council on Radiation Protection and Measurements) Recommended annual occupational dose limit for ionizing radiation exposure to workers is 50 mSv (5 rem). This limit is designed to minimize the risk of radiation-related health effects, such as cancer and genetic damage, for those who work with or around radioactive materials. This limit applies to those who might be exposed to radiation in healthcare, research, nuclear industry, and other fields where occupational exposure is possible.