This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
Mammography has 90% sensitivity and 98% specificity for breast carcinova. What is the probability that woman with breast carcinoma remains un diagnosed for 2 consecutive years? 
Select and explain. 
A. 1\/10, B. 2\/10, C. 1\/100, D. 2\/100
B: 2\/10
Answer: B: 2\/10 
Explanation: False positive = 1- sensitivity = 1- 0.9 = 0.1 For 2 consecutive years = 2x0.1=0.2