The maximum permissible level of occupational exposure to radiation is ..... Per year -
Park's textbook of preventive and social medicine 23rd edition. * The amount of radiation from outer space and background radiationhas been estimated to be 0.1 rad a year,the additional permissible dose from man made sources should not exceed 5 rad a year.
5 rad
2 rad
10 rad
50 rad
Environment and health