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
All are TRUE about Mammography, EXCEPT: 
Select and explain. 
A. Low energy X rays are used, B. It is a screening and diagnostic tool, C. High positive predictive value, D. Specificity of mammography is 95%
C: High positive predictive value
Answer: C: High positive predictive value 
Explanation: Mammography has a relatively low positive predictive value and result in high percentage of biopsy results negative for malignant growth. Mammography is widely used as a screening test for early identification of breast cancer. It is the most effective method for the detection of calcifying early stage breast cancer and has a high sensitivity for the detection of suspicious masses in fatty and fibroglandular breast tissue. Low energy X rays used in mammography produces high contrast images that differentiate normal breast tissue from possible abnormalities. It has a high specificity of 90-95%.