Screening of Diseases

In the following natural history of disease flowchart, point A to C is called as?

Which of the following is the best level of prevention of breast cancer?

Which of the following is an example of prospective screening?

In a district-level survey, the introduction of breast cancer screening showed an increased 5- year survival rate, but autopsy data revealed no change in mortality. What type of bias does this represent?

A dietary survey report indicates that the 5-year survival rate for breast cancer has increased following the introduction of a new screening method. However, autopsy data shows no change in overall mortality. What type of bias does this scenario illustrate?