..Similar figures mean when two figures are of the same shape but are of different sizes. In other words, two figures are called similar when they both have a lot of the same properties but still may not be identical.
Congruent means identical in shape and size. Congruence can be applied to line segments, angles, and figures. Any two line segments are said to be congruent if they are equal in length. Two angles are said to be congruent if they are of equal measure. Two triangles are said to be congruent if their corresponding sides and angles are equal.
Polygon A and Polygon B have the same shape but different sizes.
Therefore, the correct answer is choice C:
similar.