This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
The permissible dose of radiation from man sources in terms of rads per year should not exceed - 
Select and explain. 
A. 1, B. 5, C. 10, D. 15
B: 5
Answer: B: 5 
Explanation: Park's textbook of preventive and social medicine 23rd edition. * The additional permissible dose from man made sources should not exceed 5 rad a year.