Right answer is (b) Tolerance
For explanation: For adding tolerance in AutoCAD dimensions, you can create a new dimension style with tolerance values and settings. This dimension style containing tolerance values can be applied wherever tolerances are required.
To make a dimension style with tolerances, type “D” or “DIMSTYLE” on the command line and press Enter. The Dimension Style Manger window will pop up. Click on the New button from this window, give your new dimension style a name and click on the Continue button. For example, I will name this dimension style “Tolerance Dim.”