Correct Answer - Option 3 : <html> We Love <abbr title = "Border Security Force"> BSF </abbr> Very Much </html>
The <abbr> tag in HTML is used to define the abbreviation or short form of an element. The <abbr> and <acronym> tags are used as shortened versions and used to represent a series of letters. The abbreviation is used to provide useful information to the browsers, translation systems, and search-engines.
Syntax
<abbr title="Detailed-info ">Short-form</abbr>
Example
<abbr title="Border Security Force">BSF</abbr>
