<prompt> Maximum permissible dose of radiation exposure for human beings is:-1 rad per person per year 1 rad per person per year5 rad per person per year10 rad per person per year50 rad per person per year  <response>: Radiation exposure: Maximum permissible radiation exposure for humans: 5 rad per person per year ; in pregnancy 0.5 radpyr. Total natural radiation received by human 0.1 radpyr. State receiving highest solar radiation is Rajasthan. Thickness of lead apron to prevent exposure - 0.5 mm. Radiation exposure in Chernobyl tragedy - Cs, I2 and Sr. Occupational exposure - Effective dose shouldnt exceed 20 mSvyear. General Public exposure - Effective dose shouldnt exceed 1 mSvyear. 