Correct option is A
In AutoCAD, the special character for the diameter is represented by %%C. This symbol is commonly used to denote the diameter of a circle or cylindrical object in technical drawings.
Details:
· %%C: Inserts the Diameter in text strings.
· %%D: Represents a degree symbol (°) in AutoCAD.
· % Shift + D: This is not a valid AutoCAD syntax.
· %% DIA: This is not a valid special character in AutoCAD.
