Identify the Venn diagram that correctly represents the relationship among the sets: 'Shapes', 'Circles' and 'Triangles'.

Both 'Circles' and 'Triangles' are distinct geometrical entities, meaning they do not overlap with each other. However, both of them are entirely classified under the broader category of 'Shapes'. Thus, the correct Venn diagram consists of a large circle representing 'Shapes' containing two completely separate smaller circles inside it representing 'Circles' and 'Triangles' respectively.