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: Radiology
Amount of radiation used in mammography - 
Select and explain. 
A. 0.5 mSv, B. 0.7 mSv, C. 0.9 mSv, D. 1 mSv
B: 0.7 mSv
Answer: B: 0.7 mSv 
Explanation: Ans. is'b'i.e.,0.7 mSvScreening mammography and radiation A screening mammogram is an X-ray of the breast tissue for women without any breast symptoms.It uses low doses of radiation (about 0.7mSv for 4 X-rays).