This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy Pa 2, Subject name: Radiology
[{'content': 'Maximum Permitted Radiation exposure in a occupational worker per year is? \nSelect and explain. \nA. 1msv, B. 50msv, C. 20msv, D. 30 msv', 'role': 'user'}, {'content': 'Answer: D \nExplanation: AERB guidelines: Dose Limitations Pa of the body Occupational Exposure Public Exposure Whole body (Effective dose) 20 mSv/year averaged over 5 consecutive years; 30 mSv/year in any single year 1 mSv/y Lens of eyes (Equivalent dose) 150 mSv in a year 15 msv/y Skin (Equivalent dose 500 msv in a year 50 mSv/y Extremities (Hands and Feat) Equivalent dose 500 mSv in a year - For pregnant radiation workers, after declaration of pregnancy 1 mSv on the embryo/fetus should not exceed.', 'role': 'assistant'}]