Answer:
The correct syntax for adding comments is /*comment*/.
Explanation:
Cascading Style Sheets (CSS) are those sheets that are used to style a format of Web Pages. This sheets are used to details the display of HTML elements on screen, paper, and other platforms of media.
In CSS, comments are added using synatx of /*comment*/.
Comments, in CSS, is added to provide additional notes or information about the code, or restrict brower's interpretation of any part in the sheet. CSS comments can be added in any white areas found in the sheet.
Thus from the given formats of CSS comments, the correct one is the last option, that is /*comment*/.
