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
Unit of one of radiation absorbed is - 
Select and explain. 
A. Grey, B. Roengten, C. Curie, D. Bequerrel
A: Grey
Answer: A: Grey 
Explanation: Park's textbook of preventive and social medicine 23rd edition. * Gray(Gy) is the unit of absorbed dose, defined as the dose of ionizing that impa 1 Joule of energy to 1kg of absorbing material.