This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
The American Cancer Society recommends annual screening mammography for healthy women older than___________years NOT RELATED-GYN 
Select and explain. 
A. 30, B. 40, C. 50, D. 55
B: 40
Answer: B: 40 
Explanation: .