<span>The answer is Event. A user logging on, an application server connecting to a database server, an authentication server rejecting a password, or an antivirus scanner reporting a suspected virus are all examples of Event.
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<span>Format ribbon. the ribbon containing options for formatting fonts. One can change case, style, bold, italics, underline etc using the short cut keys in the format ribbon or using the menu options provided in the ribbon. It is common for microsoft word or excel applications.</span>
DROP CAP:-
<u>Drop caps are a specific kind of initial letter, large letters that appear at the beginning of a block of text. ... A drop cap is often used to signify that the reader's moved into a significant new section, or that a new chapter's begun.</u>
<u>Drop caps are a specific kind of initial letter, large letters that appear at the beginning of a block of text. ... A drop cap is often used to signify that the reader's moved into a significant new section, or that a new chapter's begun.A drop cap (dropped capital) is a large capital letter used as a decorative element at the beginning of a paragraph or section. The size of a drop cap is usually two or more lines. The following illustration shows your options for positioning a drop cap.</u>
It should be A. DOS because all of the others are operating systems.
