Which of the following diagrams best represents the relationship between Examination, Questions and Practice?

Both examinations and practice sessions inherently consist of questions. However, an examination is a formal assessment, whereas practice is a preparatory learning activity, making them two distinct categories. Therefore, the "Questions" circle acts as the common intersecting link between the "Examination" circle and the "Practice" circle, while "Examination" and "Practice" do not directly overlap each other. This is perfectly illustrated by a linear chain of three intersecting circles (Option C).