Which option gives a correct example of real form and illusionary form?

Correct answer: A sculpture is a real form, while a shaded drawing is an illusionary form

The governing concept is the difference between actual three-dimensional form and the illusion of form on a flat surface. A sculpture has height, width, and depth in physical space; it can be viewed from different angles and occupies real volume. A shaded drawing remains physically flat, but its outline, perspective, overlapping, and changes in value can persuade the eye that the pictured object has depth. Therefore, option A is correct. Option B reverses both categories: a simple flat circle is not normally a solid real form, while a stone sculpture is an actual three-dimensional object. Option C is meaningless, and option D is false because both sculpture and drawing can communicate depth, though by different means. The distinction concerns physical existence versus visual suggestion, not artistic quality.