This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which of the following are not included under 10 chemicals of major public health concern by WHO: 
Select and explain. 
A. Arsenic, B. Asbestos, C. Dioxin, D. Radium
D: Radium
Answer: D: Radium 
Explanation: Many chemicals can, when properly used, significantly contribute to the improvement of our quality of life, health and well-being. But other chemicals are highly hazardous and can negatively affect our health and environment when improperly managed.10 chemicals or groups of chemicals of major public health concern are: Air pollution Arsenic Asbestos Benzene Cadmium Dioxin and dioxin-like substances Inadequate or excess fluoride Lead Mercury Highly hazardous pesticides Ref :