This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Anatomy
Dose of radiation per study in mammography is 
Select and explain. 
A. 0.1cGy, B. 0.2, C. 0.3, D. 0.4
A: 0.1cGy
Answer: A: 0.1cGy 
Explanation: .